First Alert 1039836, Smoke And Carbon Monoxide AlarmCondition:* New Surplus Stock, In OEM Packaging. As Pictured.Additional Notes:* Talking Photoelectric Smoke and Carbon Monoxide Alarm Detects Both Carbon Monoxide And Smoke* This CO And Smoke Alarm Is Designed To Be Hardwired Into Your Home or Office* 120 Volt AC Smoke Alarm Features a Photoelectric Smoke Sensor And Electrochemical Carbon Monoxide Sensor* Voice Warning Alerts You To The Type Of Danger, As Well As The Location* In The Event of a Power Outage, The Battery Backup Allows The Combination Detector To Continue Functioning* AA Batteries And Hardwire Adapter Included* Connectable With Other Compatible BRK And Other First Alert Fire Alarms For Larger Spaces* One Button Silences a False Alarm And Tests The Combination Smoke And CO DetectorFirst Alert1039836