Home Assistant Compatible: Integrates seamlessly with Home Assistant using Zigbee2MQTT, offering smart thermostat control, energy efficiency, and convenience for managing your home's heating system effortlessly. Save Energy: The SONOFF smart radiator valve will automatically turn off when ventilating to save money and energy. It also supports 6 months of historical data queries, for daily, weekly, and monthly heating consumption views. Smart Control: Our thermostatic radiator valve has various smart functions, including APP remote control, voice control, set schedule, group control, etc, making your life smart. Enjoy more functions of the radiator thermostat valve via the eWeLink APP, it requires a Sonoff Zigbee 3.0 hub, such as ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost, and more. Valve Percentage Opening: The SONOFF Zigbee radiator valve supports opening ratios from 0% to 100%, with an accuracy of 1%. This design is to bring a comfortable room temperature. Compatible with Most Valves: The SONOFF radiator thermostat fits existing ‘M30 x 1.5mm’ radiator valves, and the valve adapters in the package are compatible with most heating systems and manufacturers. Note: TRV doesn't include 3 AA batteries.