Ooma's smart security system gives you peace of mind to always know what's happening in your home and to take action if needed. This starter kit includes a base station, four wireless door or window sensors, and one wireless motion sensor. Installation and setup is easy using your iPhone or Android mobile device. Monitor your sensors from anywhere and receive customizable alerts via push, SMS, audible notifications, or phone calls. Automatically arm and disarm the system when you come and go. Take action in an emergency with the patented Remote 911 feature, and much more. Add as many individual sensors as needed for full home coverage.