Ring Alarm 5 Piece Kit (2nd Generation) is a great way to get started in whole-home protection for your house or flat. This kit includes a Base Station, Keypad, one Contact Sensor, one Motion Detector, and a Range Extender. Control it all in the Ring app for whole-home security at your fingertips. Receive real-time notifications when your system is triggered. Choose between three security modes: Home, Away, and Disarmed. Alexa compatible. Compatible with iOS and Android operating systems. App needed for use: Yes. Operates over mobile internet. Operates over wi-fi. Motion detector. Components include Ring Alarm Base Station (including power adapter), Keypad (including power adapter). Suitable for indoor. Batteries required 1 x Li-Ion (included). Size H17, W17, D3.7cm. In the box: One Contact Sensor, one Motion Detector, Range Extender and Ethernet cable. Get started with a home alarm sytem for your house or flat. This kit includes a Base Station, Keypad, one Contact Sensor, one Motion Detector, and a Range Extender. Put whole-home security at your fingertips with Ring Alarm, a do-it-yourself wireless alarm system with optional Assisted Monitoring and Cellular Backup for £8/month. Receive real-time notifications when your security system is triggered, change your Alarm modes, and monitor your Ring devices all through the Ring app. Add additional components, such as wireless Motion Detectors, Contact Sensors, and Outdoor Siren to quickly and easily expand your home security system to suit the size and layout of your home. Ring Alarm is quick to install and easy to use. Simply plug in your Base Station, connect to wifi via the Ring app, and place your Motion Detectors and Contact Sensors where you need them most. Pair with compatible Alexa-enabled devices to arm and disarm your Ring Alarm home security system with your voice.