Anti-Tamper AlarmReceive instant alerts when someone attempts to remove the device, ensuring your home remains secure at all times Create Linked ScenesEasily set up smart scenarios in the Smart Life APPsuch as having your smart lights turn on automatically when the door is opened Remote Alert NotificationsGet notified via the APP when strangers try to break in, as the door sensor detects the intrusion in real-time Miniature Grooved DesignCrafted with a grooved design, this sensor adds a sleek and sophisticated touch to your home setup ZigBee Hub ConnectivitySeamlessly connects to your smart home system through the ZigBee hub, providing stable and efficient communication Specifications: Wireless Technology: Zigbee Operating Voltage: DC 3V (CR2032 battery, not included) Operating Temperature: -10 to +55 Low Battery Indicator: Yes Alarm Trigger Distance: 235mm Battery Life: Over 1 year (based on 20 uses per day) Main Unit Dimensions: 65mm x 26mm x 12.7mm Magnet Dimensions: 38.8mm x 10.9mm x 13mm Package included: 1 x Set of Door Magnetic Sensor 1 x English and Chinese Manual