Key Features . Works with a tado° Starter Kit and provides room-by-room scheduling and control from the tado° appEasy to self-install when replacing existing Thermostatic Radiator Valves (TRVs)Save energy by only heating the rooms you are usingAchieve your perfect temperature in every roomComes with the tado° Energy Savings Guarantee - save on your heating bills within 12 months or get your money back!“Set the temperature in the Living Room to 22 degrees” - works with Amazon Alexa / Apple HomeKit / Google Assistant . The smart way to control your heating in individual rooms Never heat your whole home again! tado° Smart Radiator Thermostats can replace your existing thermostatic radiator valves and provide room-by-room scheduling and control so you can enjoy greater comfort and improve the efficiency of your heating system.To benefit from tado° Smart Radiator Thermostats you must also install a tado° Starter Kit. Easy to install These products can be easily self-installed - simply unscrew your existing thermostatic radiator valve replace this with a tado° Smart Radiator Thermostat (using one of the 6 adaptors provided if required) and add the device in your tado° app. Easy to use The highly rated tado° app enables you to individually schedule and control each Smart Radiator Thermostat from anywhere as well as providing insights and reports about the climate of individual rooms and showing you the energy savings made by tado°.tado° is also compatible with Amazon Alexa Apple HomeKit and Google Assistant meaning you can control your heating in each room where you have a Smart Radiator Thermostat using your voice as well as integrating them into routines with your other smart home devices.tado° Smart Radiator Thermostats are available to purchase in single duo and quattro packs. Whats in the Box . 2 x tado Smart Radiator Thermostat2 x 2 AA batteries2 x set of adapters. .