Smart Contact Sensor OSEKW

Whether you are home or away, this entry sensor will send push notifications to alert you when the door/window this is fitted to is opened or closed.
24/7 monitoring: Detect door/window opening and closing in real time - receive instant alerts when door/window is opened or closed
Easy Installation: Simple do-it-yourself installation, no gateway product required connects via Wi-Fi and SmartKnight app.
Low power consumption: Uses ultra-low power MCU and Wi-Fi module with a range of up to 40m (dependent on environment)
Automate: Set devices to automatically turn on or off as door/window is opened or closed, such as a light
Wi-Fi Connectivity IEEE 802 11 b/g/n (2.4Ghz only) if you have a Dual Band system simply disable the 5Ghz frequency in your Wi-Fi Router* during set up and then enable again once set up is complete
Low battery alert - never forget to change the battery
Battery type: 1 x DC 3V CR2 battery (included)
Battery Life: 1 year (if activated 20 times a day)
*check your router manual on how to do this or contact your ISP