Carbon Monoxide and Smoke Detector Electrochemical and Photoelectric Hardwired 120 V AC 3 V AA Battery 12-Pack SC7010BA

The carbon monoxide and smoke alarm combines electrochemical CO sensing and photoelectric smoke detection for reliable dual protection. Hardwired to a 120 V AC power supply with a 3 V AA battery backup. Designed for ceiling or wall mounting. Supplied in a 12-pack for residential or commercial use.