WiFi Connection: When you are away from home, you can check and monitor via the smart WiFi connection anytime, anywhere, and push notifications will be sent when the door or window is opened. Alarm information is clear at a glance. Depending on the Wi-Fi network, you will instantly receive notifications and alerts on your phone within 2-8 seconds. (Note: 2.4GHz is only supported) Connected to Tuya App: By downloading Tuya App, you can see the push notifications in the app. When the app is placed in the background, when the phone is locked, when the door is opened, the buzzer will tell you if the door is closed or open. After unlocking, click directly to view alert information. Connected to other smart home devices: Smart WiFi connection. WiFi smart switch for magnetic door. WiFi door sensor set, Wifi smart switch. Therefore, the lights turn on automatically when they open the door and the magnetic door rotates. Easy to install: It does not require complicated installation tools. Installs with double sided tape. It can be installed on doors, drawers, windows, etc. Place it on any door in your home and give it a name so you know exactly which door has been opened. The access control sensor uses 1.5V AAA batteries (not included). If the battery is low, the phone app will remember that the battery is low. Enjoy your smart life: When you leave home, a push notification will be sent when the door or window is opened or closed, so that you can discover the intruder in time. Also, they can share the device with their family and track the history of sensor activities. If you are at home and don't want to disturb your alarm message, you can set the alarm mode without setting interruptions.