Tuya Smart ZigBee Door&Window Sensor:A Tuya ZigBee Wireless Gateway Hub is a must to work with the door&window sensor, as well as a variety of ZigBee smart products, which is proved to be and control center for smart homes and plays an irreplaceable role for all ZigBee products and realizes the whole intelligent linkage of your house. Real-time remote monitoring:Whenever and wherever you are,once Door/Window Sensor detects external objects or animals, you receive a notification by smart phone. Keep your house safe all the time.What you need to do is to keep your sensor with ZigBee hub connected. Wide Applications:Apply the smart door/window sensor to different scenes,your bedroom,garage,bathroom,garden and anywhere you like,keeping your whole house away from danger with a linkage of the smart door/window sensor,together with zigbee sensor with one zigbee hub required only. Easy to integrate into environments. Battery powered for low power consumption;New designed with hall sensing technology and tamper protection;Low battery reminder supported. Easy installation with double-side tape(not included) ,simply anywhere you like to protect your house security.Make intelligent linkage with other smart devices to achieve a comprehensive idea of intelligence. Notes: Please be clear before purchase, this product needs to be used with a zigbee3.0 gateway Before adding this device, you need to add a dream smart gateway 1. Connect the device to the power supply and that the mobile phone is connected to . 2. Open the app, click Add sub device under ZigBee intelligent gateway, and confirm device flashing mode. 3. For the on, press the reset key for more than 6S ith the pin, until the front indicator light flashes and the device indicator light flashes, then the distribution network mode can be entered. After the distribution network is successful, the distribution network indicator light flash three t