Requires the Ring Alarm Security Kit Listens to your Existing Smoke or CO Alarms Easy setup through the Ring App. Compatible with iOS and Android devices. Connects via Z-Wave (250-ft range to Base Station). Battery life of 3 years. Batteries are replaceable. Optional 24/7 professional monitoring with a Ring Protect Plan subscription (sold separately). No long-term commitments or cancellation fees. Save up to $100 per year on home insurance with a professionally monitored Ring Alarm. (Actual savings vary depending on insurance carrier and policy).