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 the bridge 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 will 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 various zigbee sensor with one zigbee hub required only. Easy to integrate into various environments. Battery powered for low power consumption; designed with hall sensing technology and tamper protection;Low battery reminder supported. Easy installation with double-side tape(not included) ,simply stick it 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 ensure that the mobile phone is connected to the network. 2. Open the app, click Add sub device under ZigBee intelligent gateway, and confirm the sub device flashing mode. 3. For the first power on, press the reset key for more than 6S ith the pin, until the front indicator light flashes and the device indicator light flashe