Smart Control SONOFF Zigbee thermostatic radiator valve has all the smart functions, including APP remote control, voice control, set schedule, group control, etc. Open Window Detection Automatically turns off the radiator when ventilating, helping to avoid unnecessary energy waste. Zigbee 3.0 Standard Compatible Supports Zigbee hubs using the 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 Manufacturers Fits existing M30 x 1.5mm radiator valves, and the valve adapters in the package are compatible with most heating systems and manufacturers. Complete Functional Child lock prevents children from mishandling the radiator. Frost protection makes sure pipes dont freeze and burst, keeping your home safe. Support 6 months of historical data query, you can use data to provide ideas for starting heating earlier or later next time. Note : Thermostatic Radiator Valve needs to be used with Zigbee Hub.Such as SONOFF Zigbee Thermostratic Radiator Valve support SONOFF NSPanel Pro, ZB Bridge Pro, and ZBDongle-E, but it doesn't support SONOFF ZBbridge. If your valve is not on this list or none of the adapters given fit your valve, consider replacing your valve with a thermostatic radiator valve. M30 x 1.5 mm. Please note that all information in this guide is indicative and in no way complete.