HIGHLIGHT [ APP Remote Control ] -Download smart life /Tuya smart APP on your phone&Tablet to control the radiator thermostat valve anywhere/anytime. [ Hand Free Voice Control ] -Compatible with amazon alexa echo ,google home ect ,a simply command to voice control the TRV. [ Programmable Weekly Schedule&Time Period ] -7days programmable weekly schedule ,6 time period/day can be setting on app. [ Family Share Function ] -You can share the TRV to your family with the limited right,create a smart home together with your family member. [ Linkage Function ] -It can linkage with other smart appliance in your home to create smart theme like leave home mode,back home mode,dinner mode,sleeping mode ect. [ Child Lock Function ]-Child Lock Function avoid kid`s operation on it. Make sure your home in smart and safe status. [ Group-Control Function ] -TRV can be set in group with valve in different room, realize group control function in special scene. SPECIFICATION -- APP:Smart Life/Tuya Smart -- Voice Control:Amazon Alexa,Google Home -- Frequency2.4GHz -- Battery2*AA Alkaline Battery (LR6) -- Battery lifeHalf a Year -- Temeprature range5-60 -- Temperature Display:0-60 -- Constant temperature tolerance1 -- Temperature Sensor:NTC -- Wireless Protocol:Zigbee 3.0 -- ConnectionM30x1.5mm -- MAX travel6mm -- Working temperature-10- 40 -- Working environmentIndoor -- Anti-Froze:Yes -- Programmable:Yes