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/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/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 plastic Color: White Transmitter Size: Approx.69.5x24mm/2.7x0.9in Magnetic Strip Size: Approx. 40.5x14.8x16mm/1.59x0.58x0.63in Battery: AAA 1.5V x 2 (not included) Standby Current: ≤5uA Alarm Current: ≤55uA Low Point Undervoltage: ≤2.7V Magnetic Control Distance: ≥15mm Protocol: IEEE 802.11b / g / n Operating Temperature: -10℃-50℃(14F-122F) Humidity: 20% -85% Storage Temperature: -10℃-60℃ (14F-140F) Storage Humidity: 0% -90% Standby Time: 6-12 months Wireless Type: 2.4 GHz Package List: 1 x Wifi Door And Window Sensor (1 x Wireless Transmitter, 1 x Magnetic Strip) 2 x Adhesive Sticker 1 x Pack of Screws 1 x Instruction Manual .