[Instant notification] Get instant notifications pushed to your phone instantly when a door or window opens or closes. Keeping you informed. [Alarm prompt] Whenever the sensor is triggered to open/close, it will sound an alarm to alert you that someone has opened your door or window. [Alarm recording] Supports viewing open/close history and battery level on the app. Never worry about missing any important moments or running out of battery. [Device Sharing] Select "Family Management" on the "My" page to share the added sensors with your family. This way they can also monitor the status of doors/windows. [Low battery reminder] When the battery is low, it will automatically remind you to replace the battery, don't worry Product name:Wifi smart door and window sensor APP:Tuya/Smart Life Wifi:Connected to router Support:For Android 4.4/iOS 8.0 or higher Battery:LR-3-1.5V x 2/AAA (not included) Battery life:6000 triggers Features:Mobile APP remote control Features:Real-time alerts and notifications Regarding battery drain.[Suitable for use with for Alexa/ Assistant] Colour:White Material:ABS Package Contents: 1 * door and window sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.