The Fibaro Smoke Sensor FGSD-002 warns you about developing fires or large changes in temperature. Easily connect the sensor to your z-wave network or your Toon thermostat. In case of smoke development or large changes in temperature, it will produce a high-pitched signal of 85 decibels, the LED lighting will change, and you'll receive a message on your smartphone. When danger has been detected, you'll find all the information you need in the smartphone app. The smoke detector works as a stand-alone device. Please note that you'll need a Fibaro base station (not included) if you want to use the 'smart' features .