Smart Door And Window Sensor Work With Google Home Alexa Smart Home Wifi Window Sensor Tuya Alarm System Door And Window Sensor 2.4GHz WiFi One-Key Connect Easy Setup Do not need home gateway, you can easily achieve the intelligent control of home appliances, simple operation, easy to use.2.4G Hz protocol is more stable, faster and more convenient 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: 2.4GWiFi Distance: 45m Battery: DC 3V LR03AAA batterynot included Alarm mode: mobile phone APP notification push Sensor: allow the maximum gap