diff --git a/src/demetriek/device.py b/src/demetriek/device.py
index a78a1506..1256c7de 100644
--- a/src/demetriek/device.py
+++ b/src/demetriek/device.py
@@ -145,6 +145,7 @@ async def display(
         brightness: int | None = None,
         brightness_mode: BrightnessMode | None = None,
         screensaver_enabled: bool | None = None,
+        on: bool | None = None,
     ) -> Display:
         """Get or set LaMetric device display information.
 
@@ -153,6 +154,7 @@ async def display(
             brightness: Brightness level to set.
             brightness_mode: Brightness mode to set.
             screensaver_enabled: Whether the screensaver should be enabled.
+            on: Whether the display should be turned on or off.
 
         Returns:
         -------
@@ -171,6 +173,9 @@ async def display(
         if screensaver_enabled is not None:
             data["screensaver"] = {"enabled": screensaver_enabled}
 
+        if on is not None:
+            data["on"] = on
+
         if data:
             response = await self._request(
                 "/api/v2/device/display",
diff --git a/src/demetriek/models.py b/src/demetriek/models.py
index b06bebce..3fc2981e 100644
--- a/src/demetriek/models.py
+++ b/src/demetriek/models.py
@@ -72,6 +72,7 @@ class Display(DataClassORJSONMixin):
         default=None, metadata=field_options(alias="type")
     )
     height: int
+    on: bool | None = None
     screensaver: DisplayScreensaver
     width: int
 
diff --git a/tests/fixtures/display.json b/tests/fixtures/display.json
index 955aa4cb..97545dce 100644
--- a/tests/fixtures/display.json
+++ b/tests/fixtures/display.json
@@ -10,6 +10,7 @@
     "min": 0
   },
   "height": 8,
+  "on": true,
   "screensaver": {
     "enabled": false,
     "modes": {
diff --git a/tests/fixtures/display_set.json b/tests/fixtures/display_set.json
index 823f8eb7..954c77bb 100644
--- a/tests/fixtures/display_set.json
+++ b/tests/fixtures/display_set.json
@@ -12,6 +12,7 @@
         "min": 0
       },
       "height": 8,
+      "on": true,
       "screensaver": {
         "enabled": false,
         "modes": {
diff --git a/tests/test_display.py b/tests/test_display.py
index ba2bd73e..bec4ab95 100644
--- a/tests/test_display.py
+++ b/tests/test_display.py
@@ -32,6 +32,7 @@ async def test_get_display(aresponses: ResponsesMockServer) -> None:
     assert display.width == 37
     assert display.height == 8
     assert display.display_type is DisplayType.MIXED
+    assert display.on is True
 
 
 async def test_set_display(aresponses: ResponsesMockServer) -> None:
@@ -46,6 +47,7 @@ async def response_handler(request: aiohttp.ClientResponse) -> Response:
             "screensaver": {
                 "enabled": False,
             },
+            "on": True,
         }
         return aresponses.Response(
             status=200,
@@ -61,6 +63,7 @@ async def response_handler(request: aiohttp.ClientResponse) -> Response:
             brightness=99,
             brightness_mode=BrightnessMode.MANUAL,
             screensaver_enabled=False,
+            on=True,
         )
 
     assert display
@@ -70,3 +73,4 @@ async def response_handler(request: aiohttp.ClientResponse) -> Response:
     assert display.height == 8
     assert display.display_type is DisplayType.MIXED
     assert display.screensaver.enabled is False
+    assert display.on is True