[WIFI Connection & Real-Time Alerts]: By connecting WIFI (2.4G only) and mobile phone connection, whether you are or , the intelligent WiFi contact sensor sends a notification to notify you when the door / window is open or closed (Note:Support only: Wi-Fi 2.4 GHz.) [Easy To Use]: Easy set up of the sensor for open doors in a few minutes - without tools or professional installation. Add components for overall house protection at any time. No hub or subscription service is required. Simply connect it to your Wi-Fi network and download the "Smartlife/ tuya"app from the . No monthly fee! [24/7 Pro Monitoring]: Door window sensor offers round the clock monitoring of your home. Use on doors, windows, cabinets, drawers or anywhere you want to notified when it is opened or closed. It's easy to keep an eye on the security of your house anytime anywhere. [Long Battery Life]: Door sensor with low power consumption offers a battery life of more than 1 year. The super long battery life avoids frequent replacement and gives you a better experience. [Widely Application]: Install the alarm sensor not only on front doors or windows, but also on garage doors, liquor cabinets, front gates, lockers, pet doors and more. Compatible Devices:Tuya/Smart Life APP Input Voltage:AAA 15V*3 battery(NO included) Installation :ceiling/wall Standby current:Less than 50UA Alarming current:Less than 140mA Standby time:5-7 Months Low-voltage notiffaction:Less than 2.8V WiFi:802.11b/g Wireless Type:2.4Ghz WiFi Detection distance:5-7m Colour:White Material:ABS Package Contents: 1 * WiFi Door Sensor (3xAAA battery not included) 1 * PIR Motion Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.