•WiFi smart TRV, does not require any central controller, can be directly connected •Designed with brightness adjustable large LCD display screen •You can control the temperature of the thermostat anytime, anywhere through the mobile APP •Support voice control, a simple command to voice control the thermostat •Open the window detection function on the home page of the APP, and the device will automatically detect •Programmable weekly schedule & time period, smart and DIY your daily life to the maximum extend •Anti-calcification, the TRV will get into calcium removal mode 12:00 AM every Monday to avoid calcification and blockage Specification: •Power supply: 3 x 1.5V alkaline AA batteries (not included) •Standby current: 6μA minimum •Protection class: IP20 •Ambient temperature: 0-50°C •Surface temperature: up to 90°C (at the radiator) •Connection: M30 x 1.5mm •Linear stroke: 4.3mm •Dimensions (WxHxD): 58.4mm x 97mm x 58.4mm Package included: •1 x Smart Radiator Valve •1 x English and Chinese User Manual