3. It is suitable for all common radiator valves and is easy to install without draining or intervening in the heating system. 1. Zigbee Smart Temperature Control Valve (TRV) is a self-controlled regulating valve installed on the radiator of the hot water heating system. 2. It controls the room temperature by changing the of hot water to the radiator. Using TRV, you can easily adjust the room temperature between 5-35℃ and save more than 15% of . 4. Remote Access: Adjust your home's temperature from anywhere using your smartphone. 5. Efficient: Helps in reducing heating costs by optimizing your heating schedules., Manufacturer: CTRLZS