No Gateway Needed: The sensor is paired with App via Bluetooth and is controlled on App via WiFi.
Low-Battery Reminder & History Records Check: There is a reminder on App about the low battery, and 3-month history records are automatically saved.
Status Sync & Camera Binding: Check the status of the sensor through App to get the real status. You can also add a camera to view.
Easy Installation: With Simple peel and stick installation, it is easy to fit in door frames and window sills.
Note: Batteries are not included in the package.