TR-01 is a smart e-TRV that gives you easy in-home control of all radiators individually from smartlife app. For remote control purpose, users can add a wifi & bluetooth gateway for connection.  Item No.: TR-01 Bluetooth 7 days 4 periods programmable(from app only)  Child lock  Frost protection  Open window detection  Smart wifi remote control (if work with bluetooth gateway) Amazon Alexa and Google Assistant voice control (if work with bluetooth gateway)