[Real-Time Door and Window Monitoring] Intelligently detects the open/close status of doors and windows, providing up-to-the-minute updates [Alarm Triggered When Opened] Remains silent when closed but sends an alarm to your device when a door or window is opened [Instant Alerts for Added Security] Sends real-time notifications to your smartphone when vibrations are detected, ideal for monitoring while away from home [Trackable History Logs] Review up to 6 months of detailed logs on every opening and closing event for peace of mind [Customizable in Tuya App] Easily rename the sensor in the Tuya app to avoid confusion and keep track of all monitored areas [Versatile Usage Across Various Spaces] Perfect for use on doors, windows, drawers, filing cabinets, safes, and more Specifications: Battery: AAA 1.5V x 2 (batteries not included) Standby current: le5uA Protocol: IEEE 802.11b/g/n Operating temperature: -10 degrees Celsius - 40 degrees Celsius (14 degrees Fahrenheit - 104 degrees Fahrenheit) Operating humidity: 20% - 85% Storage temperature: -10 degrees Celsius -60 degrees Celsius (14 degrees Fahrenheit - 140 degrees Fahrenheit) Storage humidity: 0% - 90% Standby time: 6 - 12 months Range: 45 meters Wireless type: 2.4GHz