The Aqara Door and Window Sensor T1 detects the open and close state of doors or windows through the distance between the sensor unit and the magnet. It consumes a very small amount of energy. No tools required, and simply peel and stick it to the desired place.

• 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.
• Smart Control in Apple Home App: Works with other HomeKit-enabled accessories in Apple Home to make your life easier.
• Aqara Home Automation: You can customize different scenes with our suite of smart home products. For example, when you open the door in the evening, the Aqara Door and Window Sensor will send a signal to the Aqara Wall Switch to turn on the lights. No matter how late you get home, the lights will automatically turn on.
• Security Notification: With the Door and Window Sensor, you can turn on alarm mode when you leave the house or when you are asleep. If a door or window is opened, the Hub will sound an alarm and send a notification to your phone.
• 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.