Features: 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 thermostatic radiator valve, you can conveniently adjust the room temperature between 5-30°C, and save more than 15% of energy. The radiator thermostat fits to all common radiator valves and is easy to be mounted 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. Automatic mode, manual mode and holiday mode can be switched freely to meet different requirements. Eco temperature setting and comfortable temperature setting are switchable for simple and user-friendly operation. The child lock function can lock the device to avoid changing the settings due to accidental operation. You can customize the time and setting of the