A Combination Carbon Monoxide & Smoke Alarm / Voice Warnings for Fire, Carbon Monoxide, & Low Battery / 120V AC Wire-In / 3 AA Battery Backup # Kidde Talking Carbon Monoxide & Smoke Alarm - This home alarm is designed to warn you against two types of life-threatening dangers. Smoke and Carbon Monoxide. However with dual detection, how will you know what has been detected if the alarm goes off? Well, Kidde has included a voice warning to avoid any such confusion. A clear and loud voice will let you know if there's a fire or high carbon monoxide readings. It'll even tell you if your Battery is low! 120V AC Wire-In # Peak Level Memory # Smart Hush Feature # Interconnectable # Battery Safeguard # Low Battery Warning # Electrochemical Sensor # Test Button # Battery Backup Powered by 3 AA Batteries (included) # 5-Year Limited Manufacturer's Warranty