Fangrui Product Details [app Remote Control] - Download Smart Life/tuya Smart App On Your Phonetablet To Control The Radiator Thermostat Valve Anywhere/anytime. [hand Free Voice Control] - Compatible With For , For Home ,a Simply To Voice Control The Trv. [programmable Weekly Scheduletime Period] - 7day Programmable Weekly Schedule ,4 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 . [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. App:smart Life/tuya Smart Voice Control:for ,for Home Frequency:2.4ghz Battery:2xaa Alkaline Battery (lr6)(battery