1CR2 battery powered, full of power for long time use, which can last for 1 - 1.5 years. 2Low battery reminder is provided by the app. It is also very simple for replacing the battery. Also support Wifi connection. 3Small and compact in size, brings you much convenience, beauty and enjoyable. 4Support for the linkage with other devices for Smartlife APP. 5It will keep history records of 7 days, no worry about the missing of data. 6Make your door/window smarter. When you leave home, it will push notification to you if the doors or window are opened or invaded by an external object, very convenient and safer.
