First Alert SC9120LBL Combination Alarm

Style:Hardwired Alarm |  Pattern Name:Alarm The First Alert SC9120B Hardwired Combination Ionization Smoke and Carbon Monoxide Alarm with Battery Backup delivers both smoke and carbon monoxide detection in a single unit. This 120-volt AC smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires. It also features an advanced electrochemical sensor that detects carbon monoxide leaks from multiple sources such as faulty fuel-burning appliances and blocked chimneys. If a threat is detected, the alarm sounds a loud siren that helps alert you to danger. Designed to be hardwired directly into the electrical system of your home or facility, this 120-volt hardwired smoke detector features a backup battery that helps keep the alarm functioning even in the event of a power outage. A universal mounting bracket makes installation easy and helps hide drywall cutouts, while tamper-resistant locking pins keep the alarm secure. And thanks to the convenient t