This sophisticated sensor can only be used with the Velbus system. The sensor can be configured using your PC or using the VMB1TC temperature controller. The sensor can operate a Velbus relay contact that will drive the heating/air-conditioning system. Once configured, a sensor can work like a simple thermostat. For more advanced functions it is advised to use a Velbus temperature controller VMB1TC. A local switch or Velbus push button can select day or night temperature, a comfort temperature, or set the sensor in anti-freeze mode.