First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm
by First Alert
- 120-Volt hard-wired detector. Electrochemical, Ionization sensor type, Alarm is wired directly into your electrical system and includes a battery backup and mute button, Battery backup ensures alarms work even during power outages, Combination smoke and CO alarm eliminates the need for 2 electrical boxes, 5-year limited warranty, Loud 85db Siren