When armed, the Ring Alarm Security Kit sends notifications to your phone and tablet whenever doors or windows open and when motion is detected at home. It's fully customizable and expands to fit any house or apartment. And the free Ring App puts your entire home security system at your fingertips. It also has a Panic Mode feature, which allows you to dispatch emergency services right from your Keypad. Kit includes: 1 x Base Station, 4 x Contact Sensor, 1 x Keypad, 1 x Range Extender, 1 x Motion Detector