The FIBARO Smoke Sensor is a universal, ultra-light, perfectly designed, optical Z-Wave smoke detector. Fire alarm is signaled by sound, visual indicator blinking and alarm reports sent to the other devices within Z-wave network. The optical sensor detects smoke at an early stage of fire, often before flames appear and temperature starts to rise significantly. Moreover, the device has a built-in temperature sensor, which is adjustable to allow detection of fire by exceeding given temperature threshold. The FIBARO Smoke Sensor is a battery powered device designed to be placed on the wall or ceiling. Visual indicator signals fire, operating mode and it is used to check if the device is within the Z-wave network using a built-in Z-Wave range tester. The Smoke Sensor is designed to operate in confined spaces, under normal conditions (lacking of smoke, dust or condensed water vapor).