Features:Can enjoy your smart life. When you leave home, it will send you a notification after sensing the open or close of the door or window. It is convenient for you to find the intruder in time.You can share your device with your family, and track the history of sensor activity.Compatible for Alexa and for Google Home. For Google Home can control connected devices, and for Alexa can only control the turning on or off of the device. Can also perform automated control with other smart devices that are compatible with Smart Life or IFTTT.It is convenient for you to detect doors, window, cabinets, drawers or any place to be notified when opening or closing.Easy to install, no complicated installation tools required. Sensors can be mounted using double-sided tape in just a few steps. the app Smart Life can be downloaded from GooglePlay or the Application Store to add devices, more convenient to detect the status of the door or window.Works on a 2.4G Wi-Fi network, supporting both smart and hotspots and fitting for Tuya. Door and closing notification push by the mobile phone, tamper alarm, and low power battery alarm.Specification:Material: ABS plasticColor: WhiteTransmitter Size: Approx.69.5x24mm or 2.7x0.9inMagnetic StripSize:Approx.40.5x14.8x16mm or 1.59x0.58x0.63inBattery: AAA 1.5Vx 2(not included)Standby Current: 5uAAlarm Current: 55uALow Point Undervoltage: 2.7VMagnetic Control Distance: 15mmProtocol: IEEE 802.11b or g or nOperating Temperature: -10-50(14F-122F)Humidity: 20 percent -85 percent Storage Temperature: -10-60 (14F-140F)Storage Humidity: 0 percent -90 percent Standby Time: 6-12 monthsWireless Type: 2.4 GHzPackage List:1 x Wifi Door And Window Sensor (1 x Wireless Transmitter, 1 x Magnetic Strip)2 x Adhesive Sticker1 x Pack of Screws1 x Instruction Manual.