Overview SONOFF Zigbee Thermostats Radiator Valve allows you to control the temperature more precisely with less energy, giving you a more comfortable home. Thermostat Radiator Valve allows App remote control and timing, you can control it anytime, anywhere. Alexa voice control frees your hands. Group control allows control of all radiators with just one tap. It also supports creating smart scenes, such as with SNZB-02P, when the sensor detects the temperature is too low, the thermostat radiator valve adjusts to a comfortable temperature. .