The alarm sensor can be installed not only on doors and windows, but also on garage doors, liquor cabinets, mailboxes, , pet doors, etc. [ Home Intelligent Linkage ] Automatically turns on or off devices by connecting smart door and window sensors to other devices. For example, when you open the door when you come home from work, your home will automatically . Life has never been so smart. Real time monitoring: Smart door sensors can protect your in real time. When the sensor detector is detached, you will receive real-time application push notifications, which means that your door has been opened without your permission. You can easily monitor your using door sensors. [ Application remote monitoring ] The door and window contact sensors are controlled by Tuya Intelligent Application or Smart Life Application. You can download the application from the or scan the QR code on the packaging or user manual. Please that the wireless network is 2.4GHz. Voice control: The wireless smart door sensor detector is compatible with and Google Assistant to achieve voice control. Simply add the Smart Life app or Tuya Smart app to your Alexa or Google . Power supply: 2 LR03-1.5V or AAA alkaline batteries (not included) Color: White Material: plastic Package Contents: 1 x door sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.