A great fit for 1-2 bedroom homes, this Alarm Kit includes one Base Station, one Keypad, four Contact Sensors, one Motion Detector, and one Range Extender.Includes an intuitive Keypad that can arm and disarm your Alarm and Contact Sensors that detect when doors or windows open.Choose the Ring Alarm Kit that fits your needs and detect even more with additional Alarm Sensors and accessories (sold separately) at any time.With a Ring Protect Plan (subscription required, sold separately), receive mobile notifications when your system is triggered, change your Alarm modes, and monitor all your Ring devices all through the Ring app.