Function: 1. This sensor will send you a notification when the door / window is opened or closed, so you can detect an intruder in time. 2. Push door and door closing notification via mobile phone, can realize abnormal door and window opening alarm, with tamper alarm and low battery alarm function, safer to use. 3. Support Alexa and Google Home voice control, also can perform automatic control with other Smart Life / IFTTT compatible smart devices. 4. It can work in 2.4G Wi-Fi network, you can share the device with family and track the history of sensor activity. 5. The "Smart Life" application can be downloaded from the application store to add devices for door / window status detection. It supports smart hotspots at the same time and is suitable for Tuya. 6. Very convenient to use when you open or close a door, window, cupboard, drawer or wherever you want to be notified. Easy mounting of the sensor with double-sided tape. Specification: Item Type: WiFi Door / Window Sensor Material: ABS plastic; White color Battery: 2 pcs AAA 1.5V (not included) Standby Current: 5uA Alarm current: 160uA Low undervoltage point: 2.7V Magnetron distance: 15mm / 0.6in Protocol: IEEE 802.11b / G / N support Working temperature: -10 - 40 (14 - 104 ) Working Humidity: 20% -85% Storage temperature: -10 - 60 (14 - 140 ) Storage humidity: 0% -90% Standby time: 6-8 months Wireless type: 2.4 GHz Host Body Size: Approx. 65 x 27.5 x 19.5 mm / 2.6 x 1.1 x 0.8 inch Sub-body Size: Approx. 64 x 10.5 x 19.5 mm / 2.5 x 0.4 x 0.8 inch Package List: 1 x WiFi Door/Window Sensor (Including 1 x Wireless Transmitter, 1 x Magnetic Stripe) 2 x Sticker 4 x screw 1 x Manual