Smart valve starter kit allows remote temperature control in each room using the Tapo app. Can be voice-controlled via Amazon Alexa and Google assistant, and presets and schedules can be set as required. Fits on most radiator valves with M30 x 1.5 body thread. Kit includes RA, RAV and RAVL adaptors for greater compatibility, and hub to control up to 32 radiators. Works with - Amazon Alexa - Google Home - iOS App - Android App 5-29°C Temperature Range Electronic Sensor Fully Programmable Multiple On / Offs Over 7 Days LED Display Smart Hub Supplied Works with - Amazon Alexa - Google Home - iOS App - Android App 5-29°C Temperature Range Electronic Sensor Fully Programmable Multiple On / Offs Over 7 Days LED Display Smart Hub Supplied