Carbon Monoxide and Smoke Detector Electrochemical and Ionization Hardwired 120 V AC 3 V AA Battery 6-Pack 900-0119

The carbon monoxide and smoke alarm combines electrochemical CO sensing and ionization 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 and supplied in a 6-pack, ideal for residential or commercial use.