Anti-disassembly alarm notice: When someone dismantles the equipment, you receive an alarm notice in time to safety. Create a linkage scene: Create a smart scene on the smart life APP, and the smart light turn on automatically when the door is opened. Receive alarm reminders remotely: When a breaks into the door, the door sensor can detect it and send you information through the APP. Mini or groove design: groove design makes the product more textured and refined. Multi-scene application: stick installation, which can be installed in various doors, , drawers, etc., without the home structure and appearance. Low battery alarm reminder: When the battery is low, the sensor push information through the APP to remind you to replace the battery in time. Colour:White Material:ABS Package Contents: 1 set x Smart Door Sensor(without 1 x CR2032 battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.