This kit comes with a base station to keep your system online, a keypad for in-home control, and a range extender to ensure your Alarm devices have signal. When paired with a contact sensor to cover a door or window and a motion detector to cover a room, it's a great fit for apartments and condos, with coverage of approximately 1,000 sq. ft. Create a Ring of Security with the Ring app. Receive notifications when someone triggers the motion sensors, opens a window or door, or sets off the alarm. Arm, disarm, and set your Alarm in home mode with a tap and monitor all your connected Ring devices from one simple dashboard. Place your Ring Alarm in Home mode to disarm your interior sensors, while keeping your exterior sensors armed. Set to Away mode to arm all the sensors in your home to know what happens while you're out. And Disarm your system to disarm all sensors and freely walk in and out of your home. Easily setup your Ring Alarm system in minutes. Everything you need comes in the box