diff --git a/src/demetriek/__init__.py b/src/demetriek/__init__.py
index 211a3304..414603ce 100644
--- a/src/demetriek/__init__.py
+++ b/src/demetriek/__init__.py
@@ -35,6 +35,7 @@
     Range,
     Simple,
     Sound,
+    SoundURL,
     User,
     Wifi,
 )
@@ -69,6 +70,7 @@
     "Range",
     "Simple",
     "Sound",
+    "SoundURL",
     "User",
     "Wifi",
     "WifiMode",
diff --git a/src/demetriek/const.py b/src/demetriek/const.py
index 32f83ca2..a6652a61 100644
--- a/src/demetriek/const.py
+++ b/src/demetriek/const.py
@@ -34,6 +34,7 @@ class DisplayType(str, Enum):
     GRAYSCALE = "grayscale"
     MIXED = "mixed"
     MONOCHROME = "monochrome"
+    FULL_RGB = "full_rgb"
 
 
 class NotificationIconType(str, Enum):
diff --git a/src/demetriek/device.py b/src/demetriek/device.py
index 1256c7de..5c48f547 100644
--- a/src/demetriek/device.py
+++ b/src/demetriek/device.py
@@ -19,7 +19,14 @@
     LaMetricConnectionTimeoutError,
     LaMetricError,
 )
-from .models import Audio, Bluetooth, Device, Display, Notification, Wifi
+from .models import (
+    Audio,
+    Bluetooth,
+    Device,
+    Display,
+    Notification,
+    Wifi,
+)
 
 if TYPE_CHECKING:
     from .const import BrightnessMode
@@ -137,6 +144,7 @@ async def device(self) -> Device:
             ssid=response["wifi"].get("essid"),
             rssi=response["wifi"].get("strength"),
         )
+
         return Device.from_dict(response)
 
     async def display(
diff --git a/src/demetriek/models.py b/src/demetriek/models.py
index 3fc2981e..1b05a627 100644
--- a/src/demetriek/models.py
+++ b/src/demetriek/models.py
@@ -73,7 +73,7 @@ class Display(DataClassORJSONMixin):
     )
     height: int
     on: bool | None = None
-    screensaver: DisplayScreensaver
+    screensaver: DisplayScreensaver | None = None
     width: int
 
 
@@ -96,8 +96,8 @@ class Wifi(DataClassORJSONMixin):
 class Device(DataClassORJSONMixin):
     """Object holding the state of an LaMetric device."""
 
-    audio: Audio
-    bluetooth: Bluetooth
+    audio: Audio | None = None
+    bluetooth: Bluetooth | None = None
     device_id: str = field(metadata=field_options(alias="id"))
     display: Display
     mode: DeviceMode
@@ -179,13 +179,22 @@ class Config(BaseConfig):
         allow_deserialization_not_by_alias = True
 
 
+@dataclass(kw_only=True)
+class SoundURL(DataClassORJSONMixin):
+    """Sound URL model configuration."""
+
+    url: str
+    type: str = "mp3"
+    fallback: Sound | None = None
+
+
 @dataclass(kw_only=True)
 class Model(DataClassORJSONMixin):
     """Object holding the notification model of an LaMetric device."""
 
     cycles: int = 1
     frames: list[Chart | Goal | Simple]
-    sound: Sound | None = None
+    sound: SoundURL | Sound | None
 
 
 @dataclass(kw_only=True)
diff --git a/tests/test_device.py b/tests/test_device.py
index f870c650..7daf890f 100644
--- a/tests/test_device.py
+++ b/tests/test_device.py
@@ -51,6 +51,7 @@ async def test_get_device(aresponses: ResponsesMockServer) -> None:
     assert device.os_version == "2.2.2"
     assert device.mode is DeviceMode.AUTO
     assert device.model == "LM 37X8"
+    assert device.audio
     assert device.audio.volume == 100
     assert device.audio.volume_range
     assert device.audio.volume_range.range_min == 0
@@ -58,6 +59,7 @@ async def test_get_device(aresponses: ResponsesMockServer) -> None:
     assert device.audio.volume_limit
     assert device.audio.volume_limit.range_min == 0
     assert device.audio.volume_limit.range_max == 100
+    assert device.bluetooth
     assert device.bluetooth.available is True
     assert device.bluetooth.name == "LM1234"
     assert device.bluetooth.active is False
@@ -69,6 +71,7 @@ async def test_get_device(aresponses: ResponsesMockServer) -> None:
     assert device.display.width == 37
     assert device.display.height == 8
     assert device.display.display_type is DisplayType.MIXED
+    assert device.display.screensaver
     assert device.display.screensaver.enabled is False
     assert device.wifi.active is True
     assert device.wifi.available is True
@@ -103,6 +106,7 @@ async def test_get_device2(aresponses: ResponsesMockServer) -> None:
     assert device.os_version == "2.2.2"
     assert device.mode is DeviceMode.SCHEDULE
     assert device.model == "LM 37X8"
+    assert device.audio
     assert device.audio.volume == 100
     assert device.audio.volume_range
     assert device.audio.volume_range.range_min == 0
@@ -110,6 +114,7 @@ async def test_get_device2(aresponses: ResponsesMockServer) -> None:
     assert device.audio.volume_limit
     assert device.audio.volume_limit.range_min == 0
     assert device.audio.volume_limit.range_max == 100
+    assert device.bluetooth
     assert device.bluetooth.available is True
     assert device.bluetooth.name == "LM1234"
     assert device.bluetooth.active is False
diff --git a/tests/test_display.py b/tests/test_display.py
index bec4ab95..3fae093b 100644
--- a/tests/test_display.py
+++ b/tests/test_display.py
@@ -72,5 +72,6 @@ async def response_handler(request: aiohttp.ClientResponse) -> Response:
     assert display.width == 37
     assert display.height == 8
     assert display.display_type is DisplayType.MIXED
+    assert display.screensaver
     assert display.screensaver.enabled is False
     assert display.on is True