Features:  - Detect Door / Window Status: When the door/window is opened or closed, the device triggered and push notification to the phone.  - Anti-dismantle Function: When disassembling with external force, push alarm notification to your smartphone.  - App Remote Control: Home is in the hands, whenever and wherever.  - USB Power Supply: Long-term power supply, say goodbye to power outages.    Specification:  Battery: CR123A-3V;  USB Power Supply: 5V/1A;  Standby Current: 10.7uA;  Working Temperature:  0℃～ 40℃ (32°F～104°F);  Working Humidity: 20% ～ 85%;  Wireless Frequency: 2.4GHz;  Network Range: 40M;  Wireless Protocol: Zigbee 3.0 IEEE 802.15.4;  Main Body Size: 82mm*27mm*23mm;  Deputy Body Size: 50mm*13mm*16mm;    Notice: The device needs to be used with ZigBee gateway     Package Includes :  1 * Tuya Zigbee Door Sensor / Window Sensor;  1 * Screw Pack;  1 * Manual