Features:_x000D_ Smart thermostatic radiator valve that can be controlled by your phone before you come back home._x000D_ Compatible with Alexa and Google Assistant for hands-free voice control._x000D_ Create thermostat group to centralized control and support device sharing._x000D_ Programmable/ manual mode switchable, 6 periods can be set each day._x000D_ Detects opened windows by falling temperatures 6 within 4 minutes, the valve would close automatically._x000D_ 1 accuracy keeps temperature within the level you set._x000D_ Keypad locking function is designed to prevent children from operating by mistake._x000D_ With anti-froze function to prolong the service life of the device._x000D_ Note: please purchase Tuya ZigBee gateway separetly._x000D_ Specifications:_x000D_ Material: PVC_x000D_ Color: White_x000D_ Temperature Sensor: NTC_x000D_ Temperature Accuracy: 1_x000D_ Display Range: 0~60_x000D_ Temperature Setting: 5~60_x000D_ Applicable Temperature: 0~50_x000D_ Frequency: 2.4G_x000D_ Standard Installation Size: M30 * 1.5mm_x000D_ Power Supply: 2 * AA Batteries (NOT INCLUDED)_x000D_ Item Size: 95.77 * 55.0mm / 3.8 * 2.2in_x000D_ Package Size: 10.3 * 7.5 * 6.0cm / 4.1 * 3.0 * 2.4in_x000D_ Package Weight: 80g / 2.8oz_x000D_ Package List:_x000D_ 1 * ZigBee Thermostatic Radiator Valve_x000D_ 1 * Set of Installing Accessories_x000D_ 1 * User Manual (English)