Thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator. With the TRV TV02 you can conveniently adjust the room temperature between 5-30, and save more than 15% of energy. The radiator thermostat fits to all common radiator valves and is easy to mount-without having to drain any water or intervene in the heating system. The additional boost function enables the radiator to be heated up quickly for a brief period of time by opening the valve for 5 minutes. There will be a pleasant room temperature right away because of the radiated heat. 1.Smart Tuya ZigBee Radiator Actuator Thermostat:New 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.Artificially set indoor temperature, mainly used in the floor heating system to control the closing and opening of the pipe. 2.A Tuya ZigBee Wireless Gateway Hub is a Must : A ZigBee wireless hub is a must that connects to the valve many other ZigBee smart products and realizes the whole linkage of your smart home devices.Simply add your gateway to the App,then add your radiator actuator to your gateway in the App. 3.Programmable Schedule with Weekly Programming Selection:Supports manual set up 5+2,6+1 and 7 days weekly schedule with 6 periods for option ,providing you with the maximum convenience for different situation and setting customized schedule for your house temperature.Holiday mode,automatic mode,boost mode available.Choose workday and restday mode to meet your own mind. 4.Voice and Remote Control for the Tuya ZigBee Wireless Gateway:Supports App remote control via your smart phone,together with the hands-free voice control via Alexa and Google Assistant after successfully connecting your valve to Tuya /Smart Life App on the basis of one Tuya ZigBee Wireless Gateway. 5.Open Window Detection:When room temperature suddenly drop into temp. threshold,valve will close for 15 minutes.After that,if the room temp. is still lower than temp. Threshold,it will keep this mode.Besides,it's easy to read digital display with Celsius temperature. Specifications: Batteries: 2x 1.5 V LR6/mignon/AA not include Temperature range: 5-30 Display: LED Maximum radiated power: 10dBm Dimensions(W x H x D)55.3 x 54 x 98.3 mm Weight: 190 g Working temperature: -10--40 Working environment: Indoor Safety :CE/ROHS Frequency: 2.4GHz Degree of protection: Ip20