First Alert Hardwired Smoke and Carbon Monoxide Detector with Battery Backup, 12 Pack, BRK SC9120B-12 - 1 Pack Photoelectric Tec

BRK SC7010BV Combination Smoke & Carbon Monoxide Alarm with Voice & Location is easy to program with 11 pre programmed home locations. The voice alarm not only tells you what part of the home is in danger, but whether the danger is smoke or carbon monoxide. The photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam and electrochemical carbon monoxide sensor for increased accuracy. A single mute/silence button silences any nuisance alarms that may occur and tests all alarm functions. With an easy access side battery door, the batteries are easy to replace and there is no need to remove the alarm from the ceiling to change a battery. Meets UL standards.