1、Alert Message: Protect your home by opening or closing door detection. When a door or window is triggered, you will receive an alarm signal from your phone to make your home safer. 2、Easy Installation: Just take a few minutes to complete the process, and make sure the sensor and magnet are aligned. 3、Convenient Design: Compatible with the Smart Life app system, which conveniently allows you to detect the status of your doors, windows, cabinets, drawers or whatever you want to notify when it is open or closed. 4、Suitable Occasion: This smart home door sensor is suitable for factories, companies, offices, hotels, homes, stores, etc. 5、Reliable Material: This smart door window sensor is made of ABS material, sensitive and durable, not easy to break and deformation. 1 x WiFi Door Sensor Item Type: WiFi Door SensorMaterial; ABSSize: Approx: 70x25x20mm/ 2.75x 0.98x 0.78inApprox: 44x15x11mm/ 1.73x 0.59x 0.43in