First Alert SC9120LBLA Smoke/Carbon Monoxide Alarm

First Alert SC9120LBLA Hardwire Smoke/Carbon Monoxide Alarm 10-Year Battery Backup. Brand new never used. Brand First Alert. Style Round. Power source Battery Powered, Corded Electric. Alarm Audible. Sensor type Electrochemical, Ionization. Unit count 1 count. 120-Volt hardwired smoke and carbon monoxide alarms wire directly into your electrical system. Ionization smoke Sensor reliably detects particles from fast-flaming fires. Electrochemical Sensor accurately detects carbon monoxide. 10 year sealed battery included. Can integrate with up to 12 other First Alert or brk hardwired smoke detectors.