8 Piece Ring Alarm Kit V2. Includes (1) Base Station, (4) Contact Sensor, (1) Keypad, (1) Range Extender, (1) Motion Detector. 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. The free Ring App puts your entire home security system at your fingertips. Features a Panic Mode, which allows you to dispatch emergency services right from your Keypad. Get notifications when doors or windows are opened or when motion is detected at your home when the system is armed. Monitor your home from any iOS or Android device. Easy setup with no tools or professional installation required. 24 hour backup battery power and 104-decibel siren.