Key Features . Motion sensor - detects movement inside your homeCompatible with Amazon AlexaUses Z-Wave wireless tech up to a distance of 76mEasy to install with self-adhesive pads and batteriesClever motion detection can tell people and pets apart Keep an eye on every room in your home – without the cat triggering a false alarm – with the Ring Alarm Motion Detector. Compatible with Amazon Alexa it alerts you via the Ring app anytime there\'s movement inside your home and the smart sensor can tell the difference between people and pets weighing up to 22kg. Also the self-adhesive pads and battery operation mean no rewiring is needed so it can be installed by even the most DIY-phobic. No Wi-Fi or Bluetooth required – Ring\'s motion detector uses Z-Wave Wireless Mesh Network technology so it won\'t interfere with your other wireless devices.Please note to use the Ring Alarm Motion Detector you\'ll need to download the free Ring app which is compatible with all iOS and Android devices. You\'ll also need the Ring Alarm Security Kit (sold separately). Product Specifications . Dimensions (H)8.9 x (W)4.5 x (D)6.2 cmBridge Included No - Requires Ring Alarm Base StationInstallation DIYManufacturer Warranty 1 Year. .