The Ring Alarm Security Kit uses smart sensors and motion detectors that send mobile alerts when triggered. Everything is managed from the Ring app, which allows you to monitor everything from a single panel on your phone or tablet. It can also be integrated with other security devices from other brands, and you can even operate it using Amazon's Alexa. A backup battery in the kit ensures that even in the event of a power failure, the Ring kit will continue to run for up to 24 hours, using your cellular network to keep connected. As mentioned, there is no need for a subscription plan, though there are contract free Ring Protect Plans available, for either $3 or $10 a month, which allow you to store more video using the Ring app, as well as access member benefits and discounts on additional security product purchases. These might be useful if you plan to buy other equipment from Ring, such as its video doorbell, sirens, smoke detectors, cameras, and more.