Aqara Door and Window Sensor setup video, Detects if a window or door is open in real time.

Aqara Door and Window Sensor
Detects if a window or door is open in real time. Peel & Stick | Triggers Aqara Hub Alarm and Push Notification | 2 Years Battery Life. A Smart Sensor for Every Door and Window. For an added peace of mind, install the Aqara Door and Window Sensor so you will never have to worry about the status of your doors and windows. Advanced Technology, Aqara Door and Window Sensor detects the current status of doors or windows via the distance of the magnets inside the sensors between the sensor and the magnet. The sensor is also energy efficient and one battery can last over 2 years under normal usage.