diff --git a/src/Api/KktMonitor.php b/src/Api/KktMonitor.php
index d61ddbe..f1fb41e 100644
--- a/src/Api/KktMonitor.php
+++ b/src/Api/KktMonitor.php
@@ -11,9 +11,11 @@ declare(strict_types = 1);
 
 namespace AtolOnline\Api;
 
+use AtolOnline\Entities\Kkt;
+use AtolOnline\Exceptions\EmptyMonitorDataException;
+use AtolOnline\Exceptions\NotEnoughMonitorDataException;
 use GuzzleHttp\Exception\GuzzleException;
 use Illuminate\Support\Collection;
-use stdClass;
 
 /**
  * Класс для мониторинга ККТ
@@ -85,7 +87,8 @@ class KktMonitor extends AtolClient
      */
     public function getAll(?int $limit = null, ?int $offset = null): Collection
     {
-        return collect($this->fetchAll($limit, $offset)->getContent());
+        $collection = collect($this->fetchAll($limit, $offset)->getContent());
+        return $collection->map(fn($data) => new Kkt($data));
     }
 
     /**
@@ -114,12 +117,14 @@ class KktMonitor extends AtolClient
      *
      * @todo кастовать к отдельному классу со своими геттерами
      * @param string $serial_number
-     * @return stdClass
+     * @return Kkt
      * @throws GuzzleException
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
      * @see https://online.atol.ru/files/API_service_information.pdf Документация, стр 11
      */
-    public function getOne(string $serial_number): stdClass
+    public function getOne(string $serial_number): Kkt
     {
-        return $this->fetchOne($serial_number)->getContent()->data;
+        return new Kkt($this->fetchOne($serial_number)->getContent()->data);
     }
 }
diff --git a/src/Entities/Company.php b/src/Entities/Company.php
index f37f955..d5876d9 100644
--- a/src/Entities/Company.php
+++ b/src/Entities/Company.php
@@ -13,7 +13,7 @@ namespace AtolOnline\Entities;
 
 use AtolOnline\{
     Constants\Constraints,
-    Constants\SnoTypes,
+    Enums\SnoTypes,
     Exceptions\InvalidEmailException,
     Exceptions\InvalidInnLengthException,
     Exceptions\InvalidPaymentAddressException,
diff --git a/src/Entities/Entity.php b/src/Entities/Entity.php
index 0b47b2d..490fdc8 100644
--- a/src/Entities/Entity.php
+++ b/src/Entities/Entity.php
@@ -28,4 +28,4 @@ abstract class Entity implements JsonSerializable, Stringable
     {
         return json_encode($this->jsonSerialize(), JSON_UNESCAPED_UNICODE);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Entities/Kkt.php b/src/Entities/Kkt.php
new file mode 100644
index 0000000..f379d44
--- /dev/null
+++ b/src/Entities/Kkt.php
@@ -0,0 +1,149 @@
+<?php
+/*
+ * Copyright (c) 2020-2021 Антон Аксенов (Anthony Axenov)
+ *
+ * This code is licensed under MIT.
+ * Этот код распространяется по лицензии MIT.
+ * https://github.com/anthonyaxenov/atol-online/blob/master/LICENSE
+ */
+
+declare(strict_types = 1);
+
+namespace AtolOnline\Entities;
+
+use AtolOnline\Exceptions\EmptyMonitorDataException;
+use AtolOnline\Exceptions\NotEnoughMonitorDataException;
+use DateTime;
+use Exception;
+
+/**
+ * Класс сущности ККТ, получаемой от монитора
+ *
+ * @property string|null serialNumber Заводской номер ККТ
+ * @property string|null registrationNumber Регистрационный номер машины (РНМ)
+ * @property string|null deviceNumber Номер автоматического устройства (внутренний идентификатор устройства)
+ * @property DateTime|string|null fiscalizationDate Дата активации (фискализации) ФН с указанием таймзоны
+ * @property DateTime|string|null fiscalStorageExpiration Дата замены ФН (Срок действия ФН), с указанием таймзоны
+ * @property int|null signedDocuments Количество подписанных документов в ФН
+ * @property float|null fiscalStoragePercentageUse Наполненость ФН в %
+ * @property string|null fiscalStorageINN ИНН компании (указанный в ФН)
+ * @property string|null fiscalStorageSerialNumber Заводской (серийный) номер ФН
+ * @property string|null fiscalStoragePaymentAddress Адрес расчёта, указанный в ФН
+ * @property string|null groupCode Код группы кассы
+ * @property DateTime|string|null timestamp Время и дата формирования данных, UTC
+ * @property bool|null isShiftOpened Признак открыта смена (true) или закрыта (false)
+ * @property int|null shiftNumber Номер смены (или "Номер закрытой смены", когда смена закрыта)
+ * @property int|null shiftReceipt Номер документа за смену (или "Кол-во чеков закрытой смены", когда смена закрыта)
+ * @property int|null unsentDocs Количество неотправленных документов. Указывается, если значение отлично от 0.
+ * @property DateTime|string|null firstUnsetDocTimestamp Дата первого неотправленного документа. Указывается, если
+ * есть неотправленные документы.
+ * @property int|null networkErrorCode Код ошибки сети
+ * @see https://online.atol.ru/files/API_service_information.pdf Документация, стр 11
+ */
+final class Kkt extends Entity
+{
+    /**
+     * Сопоставление кодов сетевых ошибок ККТ с их описаниями
+     */
+     public const ERROR_CODES = [
+        0 => 'Нет ошибок',
+        1 => 'Отсутствует физический канал связи',
+        2 => 'Ошибка сетевых настроек или нет соединения с сервером ОФД',
+        3 => 'Разрыв соединения при передаче документа на сервер',
+        4 => 'Некорректный заголовок сессионного пакета',
+        5 => 'Превышен таймаут ожидания квитанции',
+        6 => 'Разрыв соединения при приеме квитанции',
+        7 => 'Превышен таймаут передачи документа на сервер',
+        8 => 'ОФД-процесс не иницилизирован',
+    ];
+
+    /**
+     * @var string[] Список обязательных атрибутов
+     */
+    private array $properties = [
+        'serialNumber',
+        'registrationNumber',
+        'deviceNumber',
+        'fiscalizationDate',
+        'fiscalStorageExpiration',
+        'signedDocuments',
+        'fiscalStoragePercentageUse',
+        'fiscalStorageINN',
+        'fiscalStorageSerialNumber',
+        'fiscalStoragePaymentAddress',
+        'groupCode',
+        'timestamp',
+        'isShiftOpened',
+        'shiftNumber',
+        'shiftReceipt',
+        //'unsentDocs',
+        //'firstUnsetDocTimestamp',
+        'networkErrorCode',
+    ];
+
+    /**
+     * @var string[] Массив атрибутов, которые кастуются к DateTime
+     */
+    private array $timestamps = [
+        'fiscalizationDate',
+        'fiscalStorageExpiration',
+        'firstUnsetDocTimestamp',
+        'timestamp',
+    ];
+
+    /**
+     * Конструктор
+     *
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function __construct(protected \stdClass $data)
+    {
+        if (empty((array)$data)) {
+            throw new EmptyMonitorDataException();
+        }
+        $diff = array_diff($this->properties, array_keys((array)$data));
+        if (count($diff) !== 0) {
+            throw new NotEnoughMonitorDataException($diff);
+        }
+    }
+
+    /**
+     * Эмулирует обращение к атрибутам
+     *
+     * @param string $name
+     * @return null
+     * @throws Exception
+     */
+    public function __get(string $name)
+    {
+        if (empty($this->data?->$name)) {
+            return null;
+        }
+        if (in_array($name, $this->timestamps)) {
+            return new DateTime($this->data->$name);
+        }
+        return $this->data->$name;
+    }
+
+    /**
+     * Возвращает объект с информацией о сетевой ошибке
+     *
+     * @return object
+     */
+    public function getNetworkError(): object
+    {
+        return (object)[
+            'code' => $this->data->networkErrorCode,
+            'text' => self::ERROR_CODES[$this->data->networkErrorCode],
+        ];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function jsonSerialize()
+    {
+        return $this->data;
+    }
+}
diff --git a/src/Entities/Payment.php b/src/Entities/Payment.php
index 0a3d356..bc8fd99 100644
--- a/src/Entities/Payment.php
+++ b/src/Entities/Payment.php
@@ -11,7 +11,7 @@ declare(strict_types = 1);
 
 namespace AtolOnline\Entities;
 
-use AtolOnline\Constants\PaymentTypes;
+use AtolOnline\Enums\PaymentTypes;
 
 /**
  * Класс, описывающий оплату. Тег ФФД - 1031, 1081, 1215, 1216, 1217.
diff --git a/src/Entities/Vat.php b/src/Entities/Vat.php
index 98dd642..9e85402 100644
--- a/src/Entities/Vat.php
+++ b/src/Entities/Vat.php
@@ -11,7 +11,7 @@ declare(strict_types = 1);
 
 namespace AtolOnline\Entities;
 
-use AtolOnline\Constants\VatTypes;
+use AtolOnline\Enums\VatTypes;
 
 /**
  * Класс, описывающий ставку НДС
diff --git a/src/Constants/CorrectionTypes.php b/src/Enums/CorrectionTypes.php
similarity index 96%
rename from src/Constants/CorrectionTypes.php
rename to src/Enums/CorrectionTypes.php
index e0c1c9c..7cd82d9 100644
--- a/src/Constants/CorrectionTypes.php
+++ b/src/Enums/CorrectionTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/DocumentTypes.php b/src/Enums/DocumentTypes.php
similarity index 95%
rename from src/Constants/DocumentTypes.php
rename to src/Enums/DocumentTypes.php
index d4573a6..2f93622 100644
--- a/src/Constants/DocumentTypes.php
+++ b/src/Enums/DocumentTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/PaymentMethods.php b/src/Enums/PaymentMethods.php
similarity index 98%
rename from src/Constants/PaymentMethods.php
rename to src/Enums/PaymentMethods.php
index 498131a..b82db22 100644
--- a/src/Constants/PaymentMethods.php
+++ b/src/Enums/PaymentMethods.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/PaymentObjects.php b/src/Enums/PaymentObjects.php
similarity index 99%
rename from src/Constants/PaymentObjects.php
rename to src/Enums/PaymentObjects.php
index 313e552..741084d 100644
--- a/src/Constants/PaymentObjects.php
+++ b/src/Enums/PaymentObjects.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/PaymentTypes.php b/src/Enums/PaymentTypes.php
similarity index 98%
rename from src/Constants/PaymentTypes.php
rename to src/Enums/PaymentTypes.php
index 54a93a2..68ad635 100644
--- a/src/Constants/PaymentTypes.php
+++ b/src/Enums/PaymentTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/ReceiptOperationTypes.php b/src/Enums/ReceiptOperationTypes.php
similarity index 97%
rename from src/Constants/ReceiptOperationTypes.php
rename to src/Enums/ReceiptOperationTypes.php
index 83ed9f0..2e55820 100644
--- a/src/Constants/ReceiptOperationTypes.php
+++ b/src/Enums/ReceiptOperationTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/SnoTypes.php b/src/Enums/SnoTypes.php
similarity index 97%
rename from src/Constants/SnoTypes.php
rename to src/Enums/SnoTypes.php
index 4aca641..0892fc6 100644
--- a/src/Constants/SnoTypes.php
+++ b/src/Enums/SnoTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Constants/VatTypes.php b/src/Enums/VatTypes.php
similarity index 96%
rename from src/Constants/VatTypes.php
rename to src/Enums/VatTypes.php
index d78e0ad..f8e377e 100644
--- a/src/Constants/VatTypes.php
+++ b/src/Enums/VatTypes.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace AtolOnline\Constants;
+namespace AtolOnline\Enums;
 
 use MyCLabs\Enum\Enum;
 
diff --git a/src/Exceptions/EmptyMonitorDataException.php b/src/Exceptions/EmptyMonitorDataException.php
new file mode 100644
index 0000000..7aad529
--- /dev/null
+++ b/src/Exceptions/EmptyMonitorDataException.php
@@ -0,0 +1,23 @@
+<?php
+/*
+ * Copyright (c) 2020-2021 Антон Аксенов (Anthony Axenov)
+ *
+ * This code is licensed under MIT.
+ * Этот код распространяется по лицензии MIT.
+ * https://github.com/anthonyaxenov/atol-online/blob/master/LICENSE
+ */
+
+declare(strict_types = 1);
+
+namespace AtolOnline\Exceptions;
+
+/**
+ * Исключение, возникающее при попытке создать объект ККТ без данных от монитора
+ */
+class EmptyMonitorDataException extends AtolException
+{
+    /**
+     * @var string Сообщение об ошибке
+     */
+    protected $message = 'Cannot create KKT entity without data from monitor';
+}
\ No newline at end of file
diff --git a/src/Exceptions/InvalidDocumentTypeException.php b/src/Exceptions/InvalidDocumentTypeException.php
index d691893..c7aca45 100644
--- a/src/Exceptions/InvalidDocumentTypeException.php
+++ b/src/Exceptions/InvalidDocumentTypeException.php
@@ -11,7 +11,7 @@ declare(strict_types = 1);
 
 namespace AtolOnline\Exceptions;
 
-use AtolOnline\Constants\DocumentTypes;
+use AtolOnline\Enums\DocumentTypes;
 use Throwable;
 
 /**
diff --git a/src/Exceptions/InvalidSnoException.php b/src/Exceptions/InvalidSnoException.php
index 45ad49e..e4a728f 100644
--- a/src/Exceptions/InvalidSnoException.php
+++ b/src/Exceptions/InvalidSnoException.php
@@ -11,7 +11,7 @@ declare(strict_types = 1);
 
 namespace AtolOnline\Exceptions;
 
-use AtolOnline\Constants\SnoTypes;
+use AtolOnline\Enums\SnoTypes;
 use Throwable;
 
 /**
diff --git a/src/Exceptions/NotEnoughMonitorDataException.php b/src/Exceptions/NotEnoughMonitorDataException.php
new file mode 100644
index 0000000..ed69356
--- /dev/null
+++ b/src/Exceptions/NotEnoughMonitorDataException.php
@@ -0,0 +1,38 @@
+<?php
+/*
+ * Copyright (c) 2020-2021 Антон Аксенов (Anthony Axenov)
+ *
+ * This code is licensed under MIT.
+ * Этот код распространяется по лицензии MIT.
+ * https://github.com/anthonyaxenov/atol-online/blob/master/LICENSE
+ */
+
+declare(strict_types = 1);
+
+namespace AtolOnline\Exceptions;
+
+use Throwable;
+
+/**
+ * Исключение, возникающее при попытке создать объект ККТ с неполными данными от монитора
+ */
+class NotEnoughMonitorDataException extends AtolException
+{
+    /**
+     * @var string Сообщение об ошибке
+     */
+    protected $message = 'Cannot create KKT entity without these properties: ';
+
+    /**
+     * Конструктор
+     *
+     * @param array $props_diff
+     * @param string $message
+     * @param int $code
+     * @param Throwable|null $previous
+     */
+    public function __construct(array $props_diff, $message = "", int $code = 0, Throwable $previous = null)
+    {
+        parent::__construct($message ?: $this->message . implode(', ', $props_diff), $code, $previous);
+    }
+}
\ No newline at end of file
diff --git a/tests/BasicTestCase.php b/tests/BasicTestCase.php
index f20ff62..4bd5c23 100644
--- a/tests/BasicTestCase.php
+++ b/tests/BasicTestCase.php
@@ -46,7 +46,6 @@ class BasicTestCase extends TestCase
      * Проверяет доступность API мониторинга
      *
      * @return bool
-     * @throws GuzzleException
      */
     protected function isMonitoringOnline(): bool
     {
@@ -54,9 +53,7 @@ class BasicTestCase extends TestCase
     }
 
     /**
-     * Пропускает текущий тест если API мониторинга недоступно
-     *
-     * @throws GuzzleException
+     * Пропускает текущий тест если API мониторинга недоступен
      */
     protected function skipIfMonitoringIsOffline(): void
     {
@@ -90,7 +87,7 @@ class BasicTestCase extends TestCase
      * @param object|string $expected
      * @param object|string $actual
      */
-    public function assertIsSameClass(object|string $expected, object|string $actual)
+    public function assertIsSameClass(object|string $expected, object|string $actual): void
     {
         $this->assertEquals(
             is_object($expected) ? $expected::class : $expected,
@@ -104,7 +101,7 @@ class BasicTestCase extends TestCase
      * @param string[] $parents
      * @param object|string $actual
      */
-    public function assertExtendsClasses(array $parents, object|string $actual)
+    public function assertExtendsClasses(array $parents, object|string $actual): void
     {
         $this->checkClassesIntersection($parents, $actual, 'class_parents');
     }
@@ -115,7 +112,7 @@ class BasicTestCase extends TestCase
      * @param string[] $parents
      * @param object|string $actual
      */
-    public function assertImplementsInterfaces(array $parents, object|string $actual)
+    public function assertImplementsInterfaces(array $parents, object|string $actual): void
     {
         $this->checkClassesIntersection($parents, $actual, 'class_implements');
     }
@@ -126,7 +123,7 @@ class BasicTestCase extends TestCase
      * @param string[] $parents
      * @param object|string $actual
      */
-    public function assertUsesTraits(array $parents, object|string $actual)
+    public function assertUsesTraits(array $parents, object|string $actual): void
     {
         $this->checkClassesIntersection($parents, $actual, 'class_uses');
     }
diff --git a/tests/CompanyTest.php b/tests/CompanyTest.php
index 7b8e20c..82961af 100644
--- a/tests/CompanyTest.php
+++ b/tests/CompanyTest.php
@@ -10,8 +10,8 @@
 namespace AtolOnlineTests;
 
 use AtolOnline\{
-    Constants\SnoTypes,
     Entities\Company,
+    Enums\SnoTypes,
     Exceptions\InvalidEmailException,
     Exceptions\InvalidInnLengthException,
     Exceptions\InvalidPaymentAddressException,
diff --git a/tests/ItemTest_todo.php b/tests/ItemTest_todo.php
index 88a4088..2e3b492 100644
--- a/tests/ItemTest_todo.php
+++ b/tests/ItemTest_todo.php
@@ -10,10 +10,10 @@
 namespace AtolOnlineTests;
 
 use AtolOnline\{
-    Constants\PaymentMethods,
-    Constants\PaymentObjects,
-    Constants\VatTypes,
     Entities\Item,
+    Enums\PaymentMethods,
+    Enums\PaymentObjects,
+    Enums\VatTypes,
     Exceptions\BasicTooManyException,
     Exceptions\TooHighPriceException,
     Exceptions\TooLongNameException,
diff --git a/tests/KktEntityTest.php b/tests/KktEntityTest.php
new file mode 100644
index 0000000..b1a2a9c
--- /dev/null
+++ b/tests/KktEntityTest.php
@@ -0,0 +1,153 @@
+<?php
+/*
+ * Copyright (c) 2020-2021 Антон Аксенов (Anthony Axenov)
+ *
+ * This code is licensed under MIT.
+ * Этот код распространяется по лицензии MIT.
+ * https://github.com/anthonyaxenov/atol-online/blob/master/LICENSE
+ */
+
+declare(strict_types = 1);
+
+namespace AtolOnlineTests;
+
+use AtolOnline\Entities\Kkt;
+use AtolOnline\Exceptions\EmptyMonitorDataException;
+use AtolOnline\Exceptions\NotEnoughMonitorDataException;
+use DateTime;
+use Exception;
+
+class KktEntityTest extends BasicTestCase
+{
+    /**
+     * @var array Данные для создания объекта ККТ
+     */
+    private array $sample_data = [
+        'serialNumber' => '00107703864827',
+        'registrationNumber' => '0000000003027865',
+        'deviceNumber' => 'KKT024219',
+        'fiscalizationDate' => '2019-07-22T14:03:00+00:00',
+        'fiscalStorageExpiration' => '2020-11-02T21:00:00+00:00',
+        'signedDocuments' => 213350,
+        'fiscalStoragePercentageUse' => 85.34,
+        'fiscalStorageINN' => '3026455760',
+        'fiscalStorageSerialNumber' => '9999078902004339',
+        'fiscalStoragePaymentAddress' => 'test.qa.ru',
+        'groupCode' => 'test-qa-ru_14605',
+        'timestamp' => '2019-12-05T10:45:30+00:00',
+        'isShiftOpened' => true,
+        'shiftNumber' => 126,
+        'shiftReceipt' => 2278,
+        //'unsentDocs' => 123,
+        'firstUnsetDocTimestamp' => 'there must be timestamp, but we want to get exception here to get string',
+        'networkErrorCode' => 2,
+    ];
+
+    /**
+     * Тестирует создание объекта ККТ с валидными данными
+     *
+     * @covers  \AtolOnline\Entities\Kkt::__construct
+     * @covers  \AtolOnline\Entities\Kkt::__get
+     * @covers  \AtolOnline\Entities\Kkt::jsonSerialize
+     * @covers  \AtolOnline\Entities\Kkt::__toString
+     * @throws Exception
+     */
+    public function testConstructor(): void
+    {
+        $kkt = new Kkt((object)$this->sample_data);
+        $this->assertIsSameClass(Kkt::class, $kkt);
+        $this->assertAtolable($kkt);
+    }
+
+    /**
+     * Тестирует исключение при попытке создать объект ККТ без данных от монитора
+     *
+     * @covers  \AtolOnline\Entities\Kkt::__construct
+     * @covers  \AtolOnline\Exceptions\EmptyMonitorDataException
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function testEmptyMonitorDataException(): void
+    {
+        $this->expectException(EmptyMonitorDataException::class);
+        new Kkt((object)[]);
+    }
+
+    /**
+     * Тестирует исключение при попытке создать объект ККТ без данных от монитора
+     *
+     * @covers  \AtolOnline\Entities\Kkt::__construct
+     * @covers  \AtolOnline\Exceptions\NotEnoughMonitorDataException
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function testNotEnoughMonitorDataException(): void
+    {
+        $this->expectException(NotEnoughMonitorDataException::class);
+        new Kkt((object)[
+            'fiscalizationDate' => '2021-11-20T10:21:00+00:00',
+        ]);
+    }
+
+    /**
+     * Тестирует получение атрибутов через магический геттер
+     *
+     * @covers \AtolOnline\Entities\Kkt::__get
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function testMagicGetter(): void
+    {
+        $kkt = new Kkt((object)$this->sample_data);
+
+        // string
+        $this->assertNotNull($kkt->serialNumber);
+        $this->assertIsString($kkt->serialNumber);
+        $this->assertEquals($this->sample_data['serialNumber'], $kkt->serialNumber);
+
+        // int
+        $this->assertNotNull($kkt->signedDocuments);
+        $this->assertIsInt($kkt->signedDocuments);
+
+        // float
+        $this->assertNotNull($kkt->signedDocuments);
+        $this->assertIsFloat($kkt->fiscalStoragePercentageUse);
+
+        // null
+        $this->assertNull($kkt->unsentDocs);
+
+        // DateTime
+        $this->assertNotNull($kkt->fiscalizationDate);
+        $this->assertIsSameClass(DateTime::class, $kkt->fiscalizationDate);
+    }
+
+    /**
+     * Тестирует исключение при попытке получить некорректный DateTime через магический геттер
+     *
+     * @covers \AtolOnline\Entities\Kkt::__get
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function testDateTimeException(): void
+    {
+        $this->expectException(Exception::class);
+        (new Kkt((object)$this->sample_data))->firstUnsetDocTimestamp;
+    }
+
+    /**
+     * Тестирует получение данных о сетевой ошибке
+     *
+     * @covers \AtolOnline\Entities\Kkt::getNetworkError
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
+     */
+    public function testGetNetworkError(): void
+    {
+        $kkt = new Kkt((object)$this->sample_data);
+        $this->assertIsObject($kkt->getNetworkError());
+        $this->assertEquals((object)[
+            'code' => $kkt->networkErrorCode,
+            'text' => $kkt::ERROR_CODES[$kkt->networkErrorCode],
+        ], $kkt->getNetworkError());
+    }
+}
diff --git a/tests/KktMonitorTest.php b/tests/KktMonitorTest.php
index a6ebde6..b1ca4d6 100644
--- a/tests/KktMonitorTest.php
+++ b/tests/KktMonitorTest.php
@@ -5,9 +5,12 @@ namespace AtolOnlineTests;
 use AtolOnline\Api\AtolClient;
 use AtolOnline\Api\KktMonitor;
 use AtolOnline\Api\KktResponse;
+use AtolOnline\Entities\Kkt;
 use AtolOnline\Exceptions\AuthFailedException;
 use AtolOnline\Exceptions\EmptyLoginException;
+use AtolOnline\Exceptions\EmptyMonitorDataException;
 use AtolOnline\Exceptions\EmptyPasswordException;
+use AtolOnline\Exceptions\NotEnoughMonitorDataException;
 use AtolOnline\Exceptions\TooLongLoginException;
 use AtolOnline\Exceptions\TooLongPasswordException;
 use AtolOnline\Helpers;
@@ -19,12 +22,29 @@ use GuzzleHttp\Exception\GuzzleException;
  */
 class KktMonitorTest extends BasicTestCase
 {
+    /**
+     * Возвращает объект клиента для тестирования с тестовым API АТОЛ
+     *
+     * @return AtolClient
+     * @throws EmptyLoginException
+     * @throws EmptyPasswordException
+     * @throws TooLongLoginException
+     * @throws TooLongPasswordException
+     */
+    private function newTestClient(): KktMonitor
+    {
+        $credentials = TestEnvParams::FFD105();
+        return (new KktMonitor(true))
+            ->setLogin($credentials['login'])
+            ->setPassword($credentials['password']);
+    }
+
     /**
      * Тестирует успешное создание объекта монитора без аргументов конструктора
      *
      * @covers \AtolOnline\Api\KktMonitor::__construct
      */
-    public function testConstructorWithoutArgs()
+    public function testConstructorWithoutArgs(): void
     {
         $client = new KktMonitor();
         $this->assertIsObject($client);
@@ -45,7 +65,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testConstructorWithArgs()
+    public function testConstructorWithArgs(): void
     {
         $client = new KktMonitor(false, 'login', 'password', []);
         $this->assertIsObject($client);
@@ -62,7 +82,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws EmptyLoginException
      * @throws TooLongLoginException
      */
-    public function testLogin()
+    public function testLogin(): void
     {
         $client = new KktMonitor(login: 'login');
         $this->assertEquals('login', $client->getLogin());
@@ -81,7 +101,7 @@ class KktMonitorTest extends BasicTestCase
      * @covers \AtolOnline\Api\KktMonitor::setLogin
      * @covers \AtolOnline\Exceptions\EmptyLoginException
      */
-    public function testEmptyLoginException()
+    public function testEmptyLoginException(): void
     {
         $this->expectException(EmptyLoginException::class);
         new KktMonitor(login: '');
@@ -98,7 +118,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testTooLongLoginException()
+    public function testTooLongLoginException(): void
     {
         $this->expectException(TooLongLoginException::class);
         new KktMonitor(login: Helpers::randomStr(101));
@@ -113,7 +133,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws EmptyPasswordException
      * @throws TooLongPasswordException
      */
-    public function testPassword()
+    public function testPassword(): void
     {
         $client = new KktMonitor(password: 'password');
         $this->assertEquals('password', $client->getPassword());
@@ -132,7 +152,7 @@ class KktMonitorTest extends BasicTestCase
      * @covers \AtolOnline\Api\KktMonitor::setPassword
      * @covers \AtolOnline\Exceptions\EmptyPasswordException
      */
-    public function testEmptyPasswordException()
+    public function testEmptyPasswordException(): void
     {
         $this->expectException(EmptyPasswordException::class);
         new KktMonitor(password: '');
@@ -148,7 +168,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testConstructorWithLongPassword()
+    public function testConstructorWithLongPassword(): void
     {
         $this->expectException(TooLongPasswordException::class);
         new KktMonitor(password: Helpers::randomStr(101));
@@ -161,7 +181,7 @@ class KktMonitorTest extends BasicTestCase
      * @covers \AtolOnline\Api\KktMonitor::isTestMode
      * @covers \AtolOnline\Api\KktMonitor::setTestMode
      */
-    public function testTestMode()
+    public function testTestMode(): void
     {
         $client = new KktMonitor();
         $this->assertTrue($client->isTestMode());
@@ -182,23 +202,6 @@ class KktMonitorTest extends BasicTestCase
         $this->assertFalse($client->isTestMode());
     }
 
-    /**
-     * Возвращает объект клиента для тестирования с тестовым API АТОЛ
-     *
-     * @return AtolClient
-     * @throws EmptyLoginException
-     * @throws EmptyPasswordException
-     * @throws TooLongLoginException
-     * @throws TooLongPasswordException
-     */
-    private function newTestClient(): KktMonitor
-    {
-        $credentials = TestEnvParams::FFD105();
-        return (new KktMonitor(true))
-            ->setLogin($credentials['login'])
-            ->setPassword($credentials['password']);
-    }
-
     /**
      * Тестирует авторизацию
      *
@@ -207,6 +210,7 @@ class KktMonitorTest extends BasicTestCase
      * @covers \AtolOnline\Api\KktMonitor::getAuthEndpoint
      * @covers \AtolOnline\Api\KktMonitor::doAuth
      * @covers \AtolOnline\Api\KktMonitor::auth
+     * @covers \AtolOnline\Exceptions\AuthFailedException
      * @throws EmptyLoginException
      * @throws EmptyPasswordException
      * @throws TooLongLoginException
@@ -214,7 +218,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws AuthFailedException
      * @throws GuzzleException
      */
-    public function testAuth()
+    public function testAuth(): void
     {
         $this->skipIfMonitoringIsOffline();
         $result = $this->newTestClient()->auth();
@@ -227,6 +231,7 @@ class KktMonitorTest extends BasicTestCase
      * @depends testAuth
      * @covers  \AtolOnline\Api\KktMonitor::setToken
      * @covers  \AtolOnline\Api\KktMonitor::getToken
+     * @covers  \AtolOnline\Exceptions\AuthFailedException
      * @throws AuthFailedException
      * @throws EmptyLoginException
      * @throws EmptyPasswordException
@@ -234,7 +239,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testGetToken()
+    public function testGetToken(): void
     {
         $client = new KktMonitor();
         $this->assertNull($client->getToken());
@@ -250,6 +255,7 @@ class KktMonitorTest extends BasicTestCase
      *
      * @depends testAuth
      * @covers  \AtolOnline\Api\KktMonitor::getResponse
+     * @covers  \AtolOnline\Exceptions\AuthFailedException
      * @throws AuthFailedException
      * @throws EmptyLoginException
      * @throws EmptyPasswordException
@@ -257,7 +263,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testGetResponse()
+    public function testGetResponse(): void
     {
         $this->skipIfMonitoringIsOffline();
         $client = $this->newTestClient();
@@ -273,6 +279,7 @@ class KktMonitorTest extends BasicTestCase
      * @covers  \AtolOnline\Api\AtolClient::getUrlToMethod
      * @covers  \AtolOnline\Api\KktMonitor::fetchAll
      * @covers  \AtolOnline\Api\KktMonitor::getAll
+     * @covers  \AtolOnline\Exceptions\AuthFailedException
      * @throws AuthFailedException
      * @throws EmptyLoginException
      * @throws EmptyPasswordException
@@ -280,7 +287,7 @@ class KktMonitorTest extends BasicTestCase
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
      */
-    public function testMonitorGetAll()
+    public function testMonitorGetAll(): void
     {
         $this->skipIfMonitoringIsOffline();
         $client = $this->newTestClient();
@@ -289,6 +296,7 @@ class KktMonitorTest extends BasicTestCase
         $this->assertNotEmpty($client->getResponse()->getContent());
         $this->assertIsCollection($kkts);
         $this->assertTrue($kkts->count() > 0);
+        $this->assertIsSameClass(Kkt::class, $kkts->random());
     }
 
     /**
@@ -299,24 +307,30 @@ class KktMonitorTest extends BasicTestCase
      * @covers  \AtolOnline\Api\AtolClient::getUrlToMethod
      * @covers  \AtolOnline\Api\KktMonitor::fetchOne
      * @covers  \AtolOnline\Api\KktMonitor::getOne
+     * @covers  \AtolOnline\Entities\Kkt::__construct
+     * @covers  \AtolOnline\Entities\Kkt::__get
+     * @covers  \AtolOnline\Entities\Kkt::jsonSerialize
+     * @covers  \AtolOnline\Entities\Kkt::__toString
      * @throws AuthFailedException
      * @throws EmptyLoginException
      * @throws EmptyPasswordException
      * @throws GuzzleException
      * @throws TooLongLoginException
      * @throws TooLongPasswordException
+     * @throws EmptyMonitorDataException
+     * @throws NotEnoughMonitorDataException
      */
-    public function testGetOne()
+    public function testMOnitorGetOne(): void
     {
         $this->skipIfMonitoringIsOffline();
         $client = $this->newTestClient();
         $client->auth();
-        $kkts = $client->getAll();
-        $serial_number = $kkts->first()->serialNumber;
-        $client->getOne($serial_number);
-        $this->assertIsSameClass(KktResponse::class, $client->getResponse());
+        $serial_number = $client->getAll()->random()->serialNumber;
+        $kkt = $client->getOne($serial_number);
         $this->assertNotEmpty($client->getResponse());
-        $this->assertNotNull($client->getResponse()->data->serialNumber);
-        $this->assertEquals($serial_number, $client->getResponse()->data->serialNumber);
+        $this->assertIsSameClass(Kkt::class, $kkt);
+        $this->assertAtolable($kkt);
+        $this->assertNotNull($kkt->serialNumber);
+        $this->assertEquals($serial_number, $kkt->serialNumber);
     }
 }
diff --git a/tests/VatTest_todo.php b/tests/VatTest_todo.php
index b65fee9..17eaa01 100644
--- a/tests/VatTest_todo.php
+++ b/tests/VatTest_todo.php
@@ -10,9 +10,8 @@
 namespace AtolOnlineTests;
 
 use AtolOnline\{
-    Constants\VatTypes,
-    Entities\Vat
-};
+    Entities\Vat,
+    Enums\VatTypes};
 
 /**
  * Class VatTest