A great fit for 2-4 bedroom homes, this Alarm Kit includes one Base Station, two Keypads, eight Contact Sensors, two Motion Detectors, 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 allthrough the Ring app. Level-up your protection. Get 24/7 emergency police, fire and medical response with optional Alarm Professional Monitoring, keep your Ring Alarm online during a power outage, and more, for $20/month with a Ring Protect Pro Plan (subscription required, sold separately). Better with Alexa. Arm and disarm Ring Alarm with your voice with a Ring Protect Plan (subscription required, sold separately).