SONOFF Zigbee thermostatic radiator valve SONOFF TRVZB is a Zigbee thermostatic valve for smart heating control in your home. It enables remote temperature adjustment via the eWeLink app, voice commands via Alexa or Google Assistant and individual schedules to optimize energy consumption. Window opening detection stops the heating when airing, while child lock and frost protection protect your system. Compatible with M30 x 1.5 mm valves and Zigbee 3.0 hubs for seamless heating automation. Intelligent control The SONOFF Zigbee thermostatic valve for radiators supports all smart functions, including remote control via app, voice commands, scheduling and group management. Open window detection Automatically switches off the radiator during ventilation to avoid wasting energy. Compatible with Zigbee 3.0 standard Compatible with Zigbee 3.0 hubs such as SONOFF iHost, NSPanel Pro, ZB Bridge Pro, ZBDongle-P and ZBDongle-E as well as all Zigbee 3.0-compatible hubs. Comprehensive heating system compatibility Suitable for standard radiator valves "M30 x 1.5 mm"; includes adapters compatible with most heating systems and manufacturers. Comprehensive functions Child lock prevents accidental changes by children. Frost protection prevents pipes from freezing and bursting. Supports 6 months of historical data so you can optimize heating schedules based on usage trends. Control anytime, anywhere Reach for your phone, start the heating in advance and a cozy room will be waiting for you when you arrive home. Set schedules Set the heating schedule according to your daily needs, making your life much easier and heating only when needed. Window open detection to save energy Automatically switches off the radiator when airing, helping to avoid unnecessary energy waste. Voice control leaves your hands free With just one simple command, you can set the ideal temperature for your room Ensure comfort with an external sensor Is there a slight temperature difference between the room and the area around the radiator? You can select a SONOFF Zigbee temperature sensor as an external sensor. If the temperature drops, the radiator switches on immediately and ensures warm temperatures in the room. Multi-room control for comfort throughout the house The temperature of each room can be controlled and adjusted independently to meet the comfort needs of each family member and each room. Compatible with most heating manufacturers Fits existing radiator valves "M30 x 1.5 mm" and the valve adapters included in the package are compatible with most heating systems and manufacturers. Intelligent scenes create more possibilities With temperature and humidity sensors, various intelligent scenes can meet your individual needs.