DIY home security system ideal for a house or apartment. Includes a base station, contact sensor, motion detector, keypad, and range extender. Installs without tools or professional installation. Place contact sensor on any door or window and an alert will be sent to your smart phone or tablet when the window is opened. Easily arm and disarm the system with the free Ring app. Compatible with iOS and Android devices. Can also be controlled with included keypad. Features 3 security modes: Away activates the entire system, Disarmed deactivates the entire system, and Home activates select sensors to fit your needs. Place motion detector in any room and you will get a mobile alert when motion is detected. Also comes with a 24-hour back-up battery. Base station connects to your home network via Ethernet or Wi-Fi and links to all available alarm components. Built-in 110-decibel siren. Compatible with additional Ring devices.