For your peace of mind, Aqara device sends notification once dedicating any unusual movement.

Description:

• Whenever the door/window opens unexpectedly, the Aqara Door and Window Sensor will send an alert notification to your phone and activate the local alarm on the Aqara Hub.
• The Aqara Door and Window Sensor works with most types of doors, windows, and other fixtures with similar mechanism, such as drawers, cabinets, and more.
• Compatible with Apple Home Kit, Alexa for a hands-free experience.
• Requires a secured 2. 4 gigahertz WiFi network connection.
• Installation process please Press here.
• Color: White
• Power Source: Battery Powered
• Product Dimension: 41 x 22 x 11 millimeters
• Number of batteries: 1 Lithium Battery
• Noise level: 70 db