Siemens original Smart Thermostat was developed to provide professional control and operation of heating and cooling applications. Its clean design fits every interior. It is always in touch with its surroundings thanks to the six powerful and accurate sensors: temperature, humidity, light, proximity, presence and organic particle detection. Because all the sensors are integral to the Smart Thermostat, there is no additional wiring or programming. These sensors allow the Smart Thermostat to be fully autonomous.