The Alarm Smoke and CO Listener sends you real-time mobile notifications¹ whenever it hears sirens from the nearby existing smoke or CO alarms in your home.

• Requires the Ring Alarm or Ring Alarm Pro Security Kit.
• Sends notifications to your phone and tablet, subscription required, sold separately.
• Place within 6 inches of existing smoke or CO alarms (for optimal performance, install within 3 inches).²