Descriptions： 1. Mini design with simple and clear LCD display screen on the body, the radiator thermostat is with LCD digital display screen and two sections of AA batteries powered, which is a special valve using cooperatively with heating radiator. 2. Artificially set indoor temperature, mainly used in the floor heating system to control the closing and opening of the pipe. 3. Programmable Schedule with Weekly Programming Selection, supports manual set up 5+2,6+1 and weekly schedule with 6 periods for option. 4. Supports App remote control via your smart phone. Properties: Material: ABS, electronic components APP: Tuya Smart Voice control: supported Frequency: 2.4 GHz Batteries: 2*AA batteries (not included) Battery life: 1.5 years Temperature range: 5 ° C to 35 ° C Protection level: IP20 Constant temperature tolerance: ±0.7℃ Connection: M30x1. 5 mm Maximum stroke: 6mm Operating temperature: -10℃-40℃ Working environment: indoor Programmable: Yes Packing weight: 181.6g Package size: 10.5*8*6cm\4.13*3.15*2.36in Packing list: 1x Smart radiator thermostat 1 x instruction