First Alert Hardwired 120V Electrochemical/Ionization Carbon Monoxide and Smoke Alarm

Combination smoke & carbon monoxide detector. Alerts to both smoke and carbon monoxide in one device. Designed for hardwired installation, but features a 10-year battery back-up allowing the unit to function if the power goes out. Features hardwire adapter so there is no need to rewire. Can be connected to other compatible BRK or First Alert CO/smoke detectors within a single family residence. Includes single button silence or test function.