Adopt ultra-low power consumption program control processing technology Adopt general-purpose 2 AAA batteries (NOT Included), easy to buy, and the battery lasts for more than half a year Illegal door opening alarm Real-time report if doors and windows are not closed Low battery reminder Support for Apple and Android systems Fully integrated design, beautiful and delicate FIFI standard IEEE802.11b/g/n wireless standard Alarm output: WiFi transmission alarm Independent WIFI door magnetic alarm, real-time detection of doors/windows, drawers being illegally opened and closed state alarms The whole process of mobile phone APP remote monitoring, everything is under control Widely used in shops, homes, banks, dangerous areas, epidemic isolation control, etc. Specification: Working voltage: 3V (2 AAA alkaline batteries, NOT Included) Quiescent current: 30A Working current: 35mA Wi-Fi: IEEE 802 11 b 2.4GHz Working environment: -10-50 (14-122) Package included: 1 x WIFI Door Window Sensor 1 x English and Chinese User Manual