Smart ControlSONOFF Zigbee thermostatic radiator valve has all smart functions, including APP remote control, voice control, schedule setting, group control, etc. Open Window DetectionAutomatically turns off the radiator when ventilation, helping to avoid unnecessary energy waste. Zigbee 3.0 Standard CompatibleSupports Zigbee hubs using Zigbee 3.0 protocol, and theoretically supports adding to any Zigbee hub developed in accordance with Zigbee 3.0 protocols. Such as SONOFF NSPanel Pro, ZB Bridge Pro, and ZBDongle-E. Compatible with Most Heating ManufacturersSuitable for existing 'M30 x 1.5mm' radiator valves, and the valve adapters in the package are compatible with most heating systems and manufacturers. Full FunctionalChild safety lock prevents children from tampering with the radiator. Anti-freeze protection ensures that the pipes do not freeze or burst, ensuring the safety of your home. Support for 6 months of historical data query allows you to use the data to find ideas to start heating earlier or later next time.