diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..9b38853
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+    "python.testing.pytestArgs": [
+        "tests"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true
+}
\ No newline at end of file
diff --git a/android_sms_gateway/domain.py b/android_sms_gateway/domain.py
index 41d0d98..a29990f 100644
--- a/android_sms_gateway/domain.py
+++ b/android_sms_gateway/domain.py
@@ -1,7 +1,7 @@
 import dataclasses
 import typing as t
 
-from .enums import ProcessState, WebhookEvent
+from .enums import ProcessState, WebhookEvent, MessagePriority
 
 
 def snake_to_camel(snake_str):
@@ -11,6 +11,20 @@ def snake_to_camel(snake_str):
 
 @dataclasses.dataclass(frozen=True)
 class Message:
+    """
+    Represents an SMS message.
+
+    Attributes:
+        message (str): The message text.
+        phone_numbers (List[str]): A list of phone numbers to send the message to.
+        with_delivery_report (bool): Whether to request a delivery report. Defaults to True.
+        is_encrypted (bool): Whether the message is encrypted. Defaults to False.
+        id (Optional[str]): The message ID. Defaults to None.
+        ttl (Optional[int]): The time-to-live in seconds. Defaults to None.
+        sim_number (Optional[int]): The SIM number to use. Defaults to None.
+        priority (Optional[MessagePriority]): The priority of the message. Defaults to None.
+    """
+
     message: str
     phone_numbers: t.List[str]
     with_delivery_report: bool = True
@@ -19,8 +33,15 @@ class Message:
     id: t.Optional[str] = None
     ttl: t.Optional[int] = None
     sim_number: t.Optional[int] = None
+    priority: t.Optional[MessagePriority] = None
 
     def asdict(self) -> t.Dict[str, t.Any]:
+        """
+        Returns a dictionary representation of the message.
+
+        Returns:
+            Dict[str, Any]: A dictionary representation of the message.
+        """
         return {
             snake_to_camel(field.name): getattr(self, field.name)
             for field in dataclasses.fields(self)
diff --git a/android_sms_gateway/enums.py b/android_sms_gateway/enums.py
index dfc190c..3613b83 100644
--- a/android_sms_gateway/enums.py
+++ b/android_sms_gateway/enums.py
@@ -28,3 +28,19 @@ class WebhookEvent(enum.Enum):
 
     SYSTEM_PING = "system:ping"
     """Triggered when the device pings the server."""
+
+
+class MessagePriority(enum.IntEnum):
+    """Priority levels for messages."""
+
+    MINIMUM = -128
+    """Minimum priority level."""
+
+    DEFAULT = 0
+    """Default priority level."""
+
+    BYPASS_THRESHOLD = 100
+    """Priority level to bypass limits and delays."""
+
+    MAXIMUM = 127
+    """Maximum priority level."""
diff --git a/tests/test_domain.py b/tests/test_domain.py
index 50fc108..8287640 100644
--- a/tests/test_domain.py
+++ b/tests/test_domain.py
@@ -1,7 +1,7 @@
 import pytest
 
-from android_sms_gateway.enums import WebhookEvent
-from android_sms_gateway.domain import MessageState, RecipientState, Webhook
+from android_sms_gateway.enums import WebhookEvent, MessagePriority
+from android_sms_gateway.domain import MessageState, RecipientState, Webhook, Message
 
 
 # Test for successful instantiation from a dictionary
@@ -135,3 +135,127 @@ def test_webhook_asdict():
     }
 
     assert webhook.asdict() == expected_dict
+
+
+@pytest.mark.parametrize(
+    "message_content,phone_numbers,with_delivery_report,is_encrypted,id,ttl,sim_number,priority,expected",
+    [
+        (
+            "Hello, world!",
+            ["123", "456"],
+            True,
+            False,
+            "msg_123",
+            300,
+            1,
+            MessagePriority.BYPASS_THRESHOLD,
+            {
+                "message": "Hello, world!",
+                "phoneNumbers": ["123", "456"],
+                "withDeliveryReport": True,
+                "isEncrypted": False,
+                "id": "msg_123",
+                "ttl": 300,
+                "simNumber": 1,
+                "priority": 100,
+            },
+        ),
+        (
+            "Hello, world!",
+            ["123", "456"],
+            True,
+            False,
+            None,
+            None,
+            None,
+            None,
+            {
+                "message": "Hello, world!",
+                "phoneNumbers": ["123", "456"],
+                "withDeliveryReport": True,
+                "isEncrypted": False,
+            },
+        ),
+        (
+            "Hello, world!",
+            ["123", "456"],
+            True,
+            False,
+            "msg_123",
+            None,
+            1,
+            None,
+            {
+                "message": "Hello, world!",
+                "phoneNumbers": ["123", "456"],
+                "withDeliveryReport": True,
+                "isEncrypted": False,
+                "id": "msg_123",
+                "simNumber": 1,
+            },
+        ),
+        (
+            "Hello, world!",
+            ["123", "456"],
+            True,
+            False,
+            "msg_123",
+            None,
+            None,
+            MessagePriority.DEFAULT,
+            {
+                "message": "Hello, world!",
+                "phoneNumbers": ["123", "456"],
+                "withDeliveryReport": True,
+                "isEncrypted": False,
+                "id": "msg_123",
+                "priority": 0,
+            },
+        ),
+        (
+            "Hi",
+            ["555"],
+            True,
+            False,
+            None,
+            None,
+            None,
+            MessagePriority.MINIMUM,
+            {
+                "message": "Hi",
+                "phoneNumbers": ["555"],
+                "withDeliveryReport": True,
+                "isEncrypted": False,
+                "priority": -128,
+            },
+        ),
+    ],
+)
+def test_message_asdict(
+    message_content,
+    phone_numbers,
+    with_delivery_report,
+    is_encrypted,
+    id,
+    ttl,
+    sim_number,
+    priority,
+    expected,
+):
+    """
+    Tests that a Message instance can be successfully converted to a dictionary
+    representation with camelCase keys and that only non-None fields are included.
+    Uses parametrized testing to cover multiple scenarios.
+    """
+    message = Message(
+        message=message_content,
+        phone_numbers=phone_numbers,
+        with_delivery_report=with_delivery_report,
+        is_encrypted=is_encrypted,
+        id=id,
+        ttl=ttl,
+        sim_number=sim_number,
+        priority=priority,
+    )
+
+    assert message.asdict() == expected