1. By connecting WiFi and your mobile phone, you will instantly receive notifications on your phone whenever a door or window is opened or closed, whether you're at home or on the go. 2. Versatile use: Install the alarm sensor not only on front doors or windows but also on garage doors, liquor cabinets, entrance gates, lockers, pet doors, and more. 3. Compatible with Alexa and Google Home. No hub or fees required. Pair our Smartlife app with Alexa or Google Home to check the status of your door sensor without using your phone. Convenient for monitoring doors, windows, cabinets, drawers, or any area where you want alerts for openings or closings. 4. Easy installation: No complicated tools needed. Scroll down to find the video on the main page showing how to connect the sensor to WiFi and Alexa. With low power consumption and a longlasting battery, you won't need frequent replacements. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store