Add-on product for tado° Starter Kits: Control more radiators or rooms individually with add-on smart radiator thermostats. Control all rooms in one app for even more precise temperature management; maximize your comfort and save even more energy. Suitable for almost all radiators with thermostatic valves (various adapters are included); vertical or horizontal installation possible, depending on the orientation. Only works with a tado° Starter Kit (V2, V3, V3+), which is sold separately. Includes: 1 x Smart Radiator Thermostat, various adapters, 2 x AA batteries.