The Bosch Smart Home Radiator Thermostat allows you to adjust individual radiator settings via the Smart Home App. The App allows you to control and monitor your radiator settings remotely and also to set heating schedules, giving you complete control over your heating and comfort. Requires the Bosch Smart Home Controller to function. If integrated into a wider Bosch Smart Home system including Bosch Door/ Window contacts, the thermostat can automatically turn down if a door or window in the same room is opened, saving you energy. For peace of mind, a frost protection system is started automatically at temperatures below 4 c. In addition to this, the thermostat periodically opens the valve to protect against calcification. Requires the bosch smart home controller to work. Compatible with iOS and Android operating systems. App needed for use: bosch smart home. Operates over mobile internet. Operates over wi-fi. Requires wireless router for use. Controls heating. Controls appliances. Sets schedules for devices. Components include 1 x radiator thermostat, 3 adapters (danfoss ra, danfoss rav, danfoss ravl), 2 x AA batteries. Batteries required 2 x AA (included). Size H18.2, W9.2, D10.3cm. 2 year.