Ring Alarm Smoke and Co Listener 2-Pack

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. Youll get real-time mobile notifications whenever it hears sirens from existing smoke or CO alarms in your home. *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.