2. Control the temperature by modifying the flow of hot water reaching the radiator. With TRV, you can easily adjust the temperature between 5 and 35 degrees Celsius and save more than 15% energy. 1. The Zigbee Intelligent Temperature Control Valve (TRV) is a self-controlled regulating valve that is installed on the radiator of the hot water heater. 3. It is suitable for all common radiator valves and is easy to install without draining or intervening in the heating one. 4. REMOTE ACCESS - Adjust your home temperature from anywhere using your smart phone. 5. ENERGY EFFICIENT - Helps reduce heating costs by optimizing heating programs., Weight: 0.50265395736 Pounds, Manufacturer: Faeymth