ZigBee thermostatic radiator valve is an energy-saving thermostat for the heating radiator that is compatible with the ZigBee wireless standard. A ZigBee gateway is a must for using this ZibBee heating radiator thermostat. It will be your best choice of temperature controlling for smart home. Features: [ZigBee Thermostatic Radiator Valve]A special valve using cooperatively with heating radiator, conveniently regulate the room temperature with the ZigBee radiator thermostat. A ZigBee gateway is a must for using this ZibBee heating radiator thermostat. [APP Control & Voice Control]It can be controlled through Smart Life or Smart APP by your smart phone before you come back home. Hands-free voice control, compatible with Alexa and Google Home. [3 Modes & Boost Function]Auto/ manual/ holiday mode for you to choose, helping you comfortably adjust the desired temperature according to different situations. Boost function enables quick, short-term radiator heating, immediately bringing comfortable warmth to the room. [Weekly Programmable & Child Lock]You can select single days of the week, all weekdays, the weekend or the entire week for weekly programming to meet different requirements. And with child lock function to prevent children from operating by mistake. [Easy Installation & Energy-saving]Comes with rich installing accessories, fits to more radiators and is easy to mount without having to drain any water or intervene in the heating system. More energy-saving, simply replace the old conventional radiator valve. [Open Window & Anti Freezing]The device automatically stops heating when it detects a sudden temperature drop (5 in 5 minutes as default); this is usually caused by an open window or door. In manual mode, when the temperature is manually adjusted to less than 5, the anti freezing function will be started until the temperature rises to 8. Note: 1. Only operate the device indoors and avoid the influence of moisture, dust and sunlight or external heat radiation. 2. Read user manual carefully for using the product. Do not allow children to play with it. 3. Please allow 1-3mm error due to manual measurement. 4. Because of the light and screen display setting, the color may be slightly different. Thanks for understanding. Specifications: Type: Type 1 (ZigBee Thermostat)/ Type 2 (Zigbee Gateway) -- (Optional) Color: White Shell Material: Plastic APP Download: Compatible with Smart Life/ Smart Power Supply: 2 * AA Battery (Not included) Temperature Range: 5-30, Step 0.5 Default Temperature: 17 and 21 Installation: M30 x 1.5/ RAVL Valve/ RAV Valve/ RA Valve Working Temperature: -10~40 Item Size: 55 * 55 * 98mm / 2.17 * 2.17 * 3.86in Item Weight: 141g / 4.97oz Package Size: 17.7 * 6 * 6cm / 6.97 * 2.36 * 2.36in Package Weight: 186g / 6.54oz Package List: 1 * ZigBee Thermostatic Radiator Valve 1 * Set of Installing Accessories 1 * User Manual (English)