-A Zigbee-compliant gateway is required to use this product (sold separately) -Alarm function via notification on the Lidl Home app -LED display touch button -Tamper alarm -Battery status display via app -Fixing to the wall: with 3M adhesive, screws and dowels or magnet (magnet included) -Expandable and compatible with other Lidl Home products -Thanks to the Zigbee 3.0 system, this item can be integrated into other Zigbee 3.0 compatible systems from different brands and manufacturers -The Lidl Home app supports iOS 9.0, Android 5.0 or higher operating systems