Features: 1.FOR HOME SECURITY: Wireless door and window sensors can be placed on your door or window to tell you through alarm notifications if your door or window is open or closed, adding an extra layer of security to your home 2.SMART CONNECTIVITY: This sensor gives you the possibility to create for ZigBee and for WiFi device scenario links that can help you create a smart home 3.EASY TO INSTALL AND SET UP: The sticker(attached) installation of the sensor can significantly save you time. Applications can also be extended to drawers, garage doors, shutters and other wide areas. Just stick in two connected places, and always safe even if you leave it unattended 4.SHARING FUNCTIONS: Share sensors with your family, allowing them to quickly control and monitor your home together, support 3 month history check 5.PRACTICAL AND RELIABLE: The opening and closing state of doors and window is synchronized on the phone, no longer need to recall whether the door or window is closed specification:Item Type: Door Window Sensor Material: ABS Color: White Battery Type: Built in 240mAh CR2032 button battery Wireless Type: For Zigbee3.0 Wireless Standard: IEEE 802.11/b/g/n PackageList: 1 x Door Window Sensor Kit 1 x Sticker 1 x Card Pin 1 x User Manual