Smart Control: The SONOFF Zigbee Thermostatic Radiator Valve offers comprehensive smart features including APP remote control, voice commands, scheduling, and group control for convenient and efficient heating management Window Detection: Automatically shuts off the radiator when windows are opened, preventing unnecessary energy waste and enhancing energy efficiency Zigbee 3.0 Standard Compatible: Supports Zigbee gateways using the Zigbee 3.0 protocol, theoretically allowing integration with any Zigbee 3.0-developed gateway such as SONOFF NSPanel Pro, ZB Bridge Pro, ZBDongle-P, and ZBDongle-E for seamless connectivity Compatibility with Most Heating Systems: Designed to fit existing "M30 x 1.5mm" radiator valves, the included adapter ensures compatibility with most heating systems and manufacturers, offering a versatile solution for various home setups Multifunctional: Equipped with a child lock to prevent accidental adjustments by children, frost protection to prevent pipes from freezing and bursting, and supports 6 months of historical data query, enabling informed decisions for heating schedules based on past data for optimized comfort and efficiency Safety Performance: Auxiliary overheating protection is implemented through a built-in temperature sensor that can detect and predict the real-time maximum temperature of the entire product. This feature prevents the product from deforming, melting, catching fire, or exposing electrical components due to overheating. In addition to ISED, FCC, RoHS, CE, and SRRC certifications, it also holds the more stringent and authoritative ETL certification Specifications: Model: TRVZB Wireless connection: Zigbee 3.0 Input: 4.5V (3x1.5V AA Batteries, not included) Battery model: 1.5V LR6 Alkaline AA Battery (not included) Threaded connection: M30 x 1.5mm Product dimension: 59.4 x 59.4 x 95mm Net weight: 154g Casing material: PC Temperature setting range: 4℃-35℃ Note: The thermostatic valve requires the use of a Zigbee gateway for operation. Please be aware that the SONOFF Zigbee Thermostatic Valve is not compatible with the SONOFF ZBbridge.