diff --git a/homeassistant/components/deconz/const.py b/homeassistant/components/deconz/const.py
index 7e16a9d7f10..e7bc5605aee 100644
--- a/homeassistant/components/deconz/const.py
+++ b/homeassistant/components/deconz/const.py
@@ -15,4 +15,6 @@ CONF_ALLOW_DECONZ_GROUPS = 'allow_deconz_groups'
 ATTR_DARK = 'dark'
 ATTR_ON = 'on'
 
-SWITCH_TYPES = ["On/Off plug-in unit", "Smart plug"]
+POWER_PLUGS = ["On/Off plug-in unit", "Smart plug"]
+SIRENS = ["Warning device"]
+SWITCH_TYPES = POWER_PLUGS + SIRENS
diff --git a/homeassistant/components/switch/deconz.py b/homeassistant/components/switch/deconz.py
index 95e7d736739..d5fb22e97c4 100644
--- a/homeassistant/components/switch/deconz.py
+++ b/homeassistant/components/switch/deconz.py
@@ -5,7 +5,8 @@ For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/switch.deconz/
 """
 from homeassistant.components.deconz.const import (
-    DOMAIN as DATA_DECONZ, DATA_DECONZ_ID, DATA_DECONZ_UNSUB, SWITCH_TYPES)
+    DOMAIN as DATA_DECONZ, DATA_DECONZ_ID, DATA_DECONZ_UNSUB,
+    POWER_PLUGS, SIRENS)
 from homeassistant.components.switch import SwitchDevice
 from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
@@ -29,8 +30,10 @@ async def async_setup_entry(hass, config_entry, async_add_devices):
         """Add switch from deCONZ."""
         entities = []
         for light in lights:
-            if light.type in SWITCH_TYPES:
-                entities.append(DeconzSwitch(light))
+            if light.type in POWER_PLUGS:
+                entities.append(DeconzPowerPlug(light))
+            elif light.type in SIRENS:
+                entities.append(DeconzSiren(light))
         async_add_devices(entities, True)
 
     hass.data[DATA_DECONZ_UNSUB].append(
@@ -56,11 +59,6 @@ class DeconzSwitch(SwitchDevice):
         """Update the switch's state."""
         self.async_schedule_update_ha_state()
 
-    @property
-    def is_on(self):
-        """Return true if switch is on."""
-        return self._switch.state
-
     @property
     def name(self):
         """Return the name of the switch."""
@@ -71,6 +69,25 @@ class DeconzSwitch(SwitchDevice):
         """Return a unique identifier for this switch."""
         return self._switch.uniqueid
 
+    @property
+    def available(self):
+        """Return True if light is available."""
+        return self._switch.reachable
+
+    @property
+    def should_poll(self):
+        """No polling needed."""
+        return False
+
+
+class DeconzPowerPlug(DeconzSwitch):
+    """Representation of power plugs from deCONZ."""
+
+    @property
+    def is_on(self):
+        """Return true if switch is on."""
+        return self._switch.state
+
     async def async_turn_on(self, **kwargs):
         """Turn on switch."""
         data = {'on': True}
@@ -80,3 +97,22 @@ class DeconzSwitch(SwitchDevice):
         """Turn off switch."""
         data = {'on': False}
         await self._switch.async_set_state(data)
+
+
+class DeconzSiren(DeconzSwitch):
+    """Representation of sirens from deCONZ."""
+
+    @property
+    def is_on(self):
+        """Return true if switch is on."""
+        return self._switch.alert == 'lselect'
+
+    async def async_turn_on(self, **kwargs):
+        """Turn on switch."""
+        data = {'alert': 'lselect'}
+        await self._switch.async_set_state(data)
+
+    async def async_turn_off(self, **kwargs):
+        """Turn off switch."""
+        data = {'alert': 'none'}
+        await self._switch.async_set_state(data)
diff --git a/tests/components/switch/test_deconz.py b/tests/components/switch/test_deconz.py
index 490a0e67c9d..57fc8b3bcd9 100644
--- a/tests/components/switch/test_deconz.py
+++ b/tests/components/switch/test_deconz.py
@@ -20,6 +20,12 @@ SUPPORTED_SWITCHES = {
         "name": "Switch 2 name",
         "type": "Smart plug",
         "state": {}
+    },
+    "3": {
+        "id": "Switch 3 id",
+        "name": "Switch 3 name",
+        "type": "Warning device",
+        "state": {}
     }
 }
 
@@ -67,8 +73,9 @@ async def test_switch(hass):
     await setup_bridge(hass, {"lights": SUPPORTED_SWITCHES})
     assert "switch.switch_1_name" in hass.data[deconz.DATA_DECONZ_ID]
     assert "switch.switch_2_name" in hass.data[deconz.DATA_DECONZ_ID]
+    assert "switch.switch_3_name" in hass.data[deconz.DATA_DECONZ_ID]
     assert len(SUPPORTED_SWITCHES) == len(SWITCH_TYPES)
-    assert len(hass.states.async_all()) == 3
+    assert len(hass.states.async_all()) == 4
 
 
 async def test_add_new_switch(hass):