Ener-J Smart Wifi Door & Window Sensor (Magnetic Contact) - Amazon Alexa & Google Home Compatible

From Ener-J, an ample solution for providing remote home monitoring. A smart window and door sensor that uses integrated wifi technology to send notifications to your phone/tablet when a door or window is opened. No hub is required for this product to work simply download the Ener-J smart application and instantly connect your devices for immediate notifications. Powered by long life rechargeable batteries, these are easily accessible and therefore easy to maintain. Works on a 2.4G wifi frequency (Not compatible with 5G). Please see downloads and technical specifications for further details. Compatible with Amazon Alexa and Google Home.