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 because of the radiated heat. 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(without batteries), 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. 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. Programmable Schedule with Weekly Programming Selection: Supports manual set up 5+2, 6+1 and 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. Material: plastic colour: white Package Contents: 1 x radiator valve 1 x gateway Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.