Tuya Smart Home Smart ZigBee Door Sensor Window Magnetic Alarm Detector Independent Work With Alexa Google Security Protection Zigbee hub is required A ZigBee gateway is required to connect the device to the Internet (ZigBee gateway is not included in the package) Detect door/window status When the door/window is opened or closed,the device triggered and push notification to the phone Linked alarm with more sensors Set up the scene: away from home mode, if someone breaks in, the the device triggered and push notification to the phone., and the IP camera (not included) will shoot the video. When someone opens the door, the light turns on automatically. APP Remote Control Home is in the hands,whenever and wherever Easy to installSmall size,easy to install Adhesive installation,can be flexibly placed in various doors, windows,drawers,etc,without destroying the appearance and structure of the original furniture Specifications: Networking: ZigBee Distance: 45m Battery: DC 3V LR03AAA battery Alarm mode: mobile phone APP notification push Sensor: allow the maximum gap