The V3+ Smart Radiator Thermostat from tado is ideal for all common radiators with thermostatic valves. As an add on to the tado V3+ Starter Kit, it lets you individually control more radiators. The Smart Radiator Thermostats are sold individually or as a Duo or Quattro pack. More highlights and features*: - Integrated temperature, ambient light and humidity sensors - Open window detection - Takes local weather forecasts into account - Heating system monitoring and consumption and activity statistics - Smart timer and individual room control - Remote control from anywhere with the app (free download) *Requires a tado starter kit with internet bridge as a basis. Includes: - 2 x AA batteries - Adapter set for radiator attachment (various valve types) Data encryption: TLS 1.2 (SSL) 2048-bit Extended Validation Certificate TLS 1.2 (SSL) 256-bit elliptic curve encryption AES-CCM encryption