diff --git a/homeassistant/components/rfxtrx/siren.py b/homeassistant/components/rfxtrx/siren.py
index 282933f7f85..acf06518959 100644
--- a/homeassistant/components/rfxtrx/siren.py
+++ b/homeassistant/components/rfxtrx/siren.py
@@ -1,6 +1,7 @@
 """Support for RFXtrx sirens."""
 from __future__ import annotations
 
+from datetime import datetime
 from typing import Any
 
 import RFXtrx as rfxtrxmod
@@ -26,7 +27,7 @@ SECURITY_PANIC_OFF = "End Panic"
 SECURITY_PANIC_ALL = {SECURITY_PANIC_ON, SECURITY_PANIC_OFF}
 
 
-def supported(event: rfxtrxmod.RFXtrxEvent):
+def supported(event: rfxtrxmod.RFXtrxEvent) -> bool:
     """Return whether an event supports sirens."""
     device = event.device
 
@@ -104,16 +105,16 @@ class RfxtrxOffDelayMixin(Entity):
     _timeout: CALLBACK_TYPE | None = None
     _off_delay: float | None = None
 
-    def _setup_timeout(self):
+    def _setup_timeout(self) -> None:
         @callback
-        def _done(_):
+        def _done(_: datetime) -> None:
             self._timeout = None
             self.async_write_ha_state()
 
         if self._off_delay:
             self._timeout = async_call_later(self.hass, self._off_delay, _done)
 
-    def _cancel_timeout(self):
+    def _cancel_timeout(self) -> None:
         if self._timeout:
             self._timeout()
             self._timeout = None
@@ -125,7 +126,13 @@ class RfxtrxChime(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin):
     _attr_supported_features = SirenEntityFeature.TURN_ON | SirenEntityFeature.TONES
     _device: rfxtrxmod.ChimeDevice
 
-    def __init__(self, device, device_id, off_delay=None, event=None):
+    def __init__(
+        self,
+        device: rfxtrxmod.RFXtrxDevice,
+        device_id: DeviceTuple,
+        off_delay: float | None = None,
+        event: rfxtrxmod.RFXtrxEvent | None = None,
+    ) -> None:
         """Initialize the entity."""
         super().__init__(device, device_id, event)
         self._attr_available_tones = list(self._device.COMMANDS.values())
@@ -133,11 +140,11 @@ class RfxtrxChime(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin):
         self._off_delay = off_delay
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if device is on."""
         return self._timeout is not None
 
-    async def async_turn_on(self, **kwargs):
+    async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         self._cancel_timeout()
 
@@ -152,7 +159,7 @@ class RfxtrxChime(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin):
 
         self.async_write_ha_state()
 
-    def _apply_event(self, event: rfxtrxmod.ControlEvent):
+    def _apply_event(self, event: rfxtrxmod.ControlEvent) -> None:
         """Apply a received event."""
         super()._apply_event(event)
 
@@ -162,7 +169,9 @@ class RfxtrxChime(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin):
             self._setup_timeout()
 
     @callback
-    def _handle_event(self, event, device_id):
+    def _handle_event(
+        self, event: rfxtrxmod.RFXtrxEvent, device_id: DeviceTuple
+    ) -> None:
         """Check if event applies to me and update."""
         if self._event_applies(event, device_id):
             self._apply_event(event)
@@ -176,7 +185,13 @@ class RfxtrxSecurityPanic(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin)
     _attr_supported_features = SirenEntityFeature.TURN_ON | SirenEntityFeature.TURN_OFF
     _device: rfxtrxmod.SecurityDevice
 
-    def __init__(self, device, device_id, off_delay=None, event=None):
+    def __init__(
+        self,
+        device: rfxtrxmod.RFXtrxDevice,
+        device_id: DeviceTuple,
+        off_delay: float | None = None,
+        event: rfxtrxmod.RFXtrxEvent | None = None,
+    ) -> None:
         """Initialize the entity."""
         super().__init__(device, device_id, event)
         self._on_value = get_first_key(self._device.STATUS, SECURITY_PANIC_ON)
@@ -184,11 +199,11 @@ class RfxtrxSecurityPanic(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin)
         self._off_delay = off_delay
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if device is on."""
         return self._timeout is not None
 
-    async def async_turn_on(self, **kwargs: Any):
+    async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         self._cancel_timeout()
 
@@ -206,7 +221,7 @@ class RfxtrxSecurityPanic(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin)
 
         self.async_write_ha_state()
 
-    def _apply_event(self, event: rfxtrxmod.SensorEvent):
+    def _apply_event(self, event: rfxtrxmod.SensorEvent) -> None:
         """Apply a received event."""
         super()._apply_event(event)
 
@@ -219,7 +234,9 @@ class RfxtrxSecurityPanic(RfxtrxCommandEntity, SirenEntity, RfxtrxOffDelayMixin)
             self._cancel_timeout()
 
     @callback
-    def _handle_event(self, event, device_id):
+    def _handle_event(
+        self, event: rfxtrxmod.RFXtrxEvent, device_id: DeviceTuple
+    ) -> None:
         """Check if event applies to me and update."""
         if self._event_applies(event, device_id):
             self._apply_event(event)