diff --git a/custom_components/tahoma/siren.py b/custom_components/tahoma/siren.py
index 518c33e0..8f9d2d61 100644
--- a/custom_components/tahoma/siren.py
+++ b/custom_components/tahoma/siren.py
@@ -1,4 +1,6 @@
 """Support for Overkiz sirens."""
+from typing import Any
+
 from pyoverkiz.enums import OverkizState
 from pyoverkiz.enums.command import OverkizCommand, OverkizCommandParam
 
@@ -23,55 +25,47 @@ async def async_setup_entry(
     hass: HomeAssistant,
     entry: ConfigEntry,
     async_add_entities: AddEntitiesCallback,
-):
+) -> None:
     """Set up the Overkiz sirens from a config entry."""
     data: HomeAssistantOverkizData = hass.data[DOMAIN][entry.entry_id]
 
-    entities = [
+    async_add_entities(
         OverkizSiren(device.device_url, data.coordinator)
         for device in data.platforms[Platform.SIREN]
-    ]
-
-    async_add_entities(entities)
+    )
 
 
 class OverkizSiren(OverkizEntity, SirenEntity):
-    """Representation an Overkiz Switch."""
+    """Representation an Overkiz Siren."""
 
     _attr_supported_features = SUPPORT_TURN_OFF | SUPPORT_TURN_ON | SUPPORT_DURATION
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Get whether the siren is in on state."""
         return (
             self.executor.select_state(OverkizState.CORE_ON_OFF)
             == OverkizCommandParam.ON
         )
 
-    async def async_turn_on(self, **kwargs):
+    async def async_turn_on(self, **kwargs: Any) -> None:
         """Send the on command."""
-
         if kwargs.get(ATTR_DURATION):
-            duration = kwargs.get(ATTR_DURATION)
+            duration = kwargs[ATTR_DURATION]
         else:
             duration = 2 * 60  # 2 minutes
 
         duration_in_ms = duration * 1000
 
         await self.executor.async_execute_command(
-            OverkizCommand.RING_WITH_SINGLE_SIMPLE_SEQUENCE,  # https://www.tahomalink.com/enduser-mobile-web/steer-html5-client/vendor/somfy/io/siren/const.js
+            # https://www.tahomalink.com/enduser-mobile-web/steer-html5-client/vendor/somfy/io/siren/const.js
+            OverkizCommand.RING_WITH_SINGLE_SIMPLE_SEQUENCE,
             duration_in_ms,  # duration
             75,  # 90 seconds bip, 30 seconds silence
             2,  # repeat 3 times
             OverkizCommandParam.MEMORIZED_VOLUME,
         )
 
-    async def async_turn_off(self, **kwargs):
+    async def async_turn_off(self, **kwargs: Any) -> None:
         """Send the off command."""
-        await self.executor.async_cancel_command(
-            [OverkizCommand.RING_WITH_SINGLE_SIMPLE_SEQUENCE]
-        )
-
-        await self.executor.async_execute_command(
-            OverkizCommand.ADVANCED_REFRESH, OverkizCommandParam.NORMAL
-        )
+        await self.executor.async_execute_command(OverkizCommand.OFF)