Ring Alarm Smoke & Co Listener

Ring Alarm Smoke and CO Listener alerts you on your smart phone when your existing smoke and carbon monoxide detectors sound their alarms.
This device does not detect fire, smoke or carbon monoxide and is intended to work with UL listed smoke and CO detectors that are 10 years old or less.
Easy setup in minutes—without tools or professional installation. Requires Ring Alarm Security System (sold separately).
Manage Ring Alarm Smoke and CO Listener and other Ring products with the Ring app.
Battery life 3 years max. Batteries are replaceable.
Optional 24/7 professional monitoring is just $10/month. No contracts or cancellation fees.