Always hear your existing smoke and CO alarms loud and clear. Simply connect the Alarm Smoke and CO Listener to your *Ring Alarm Security Kit* (sold separately) and place it near your existing smoke or CO alarms. You’ll get real-time mobile notifications whenever it hears sirens from existing smoke or CO alarms in your home.<br /><br />*This device does not detect fire, smoke or carbon monoxide and is intended to work with UL listed smoke and CO alarms that are 10 years old or less.
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