Smoke and Carbon Monoxide Alarm, First Alert, 85 dBA, Ionization Sensor, White

First Alert Smoke and Carbon Monoxide Alarm, Sound Level: 85 dBA, Sensor Type: Ionization, Power Source: Battery, Power Supply: Interconnect Hardwire, White, Dimensions: 5.6 in L x 5.6 in W x 1.9 in H

• Direct wire-in with 9V battery backup. Hardwired with battery backup for protection during power outages.
• Perfect mount for easy installation. Mounting bracket keeps the alarm secure over a wide rotation range for ideal alignment.
• Latching alarm indicator, visually identifies unit that initiated alarm or low battery.
• Smart Interconnect, interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible* alarms sound (up to 12 smoke alarms and 6 other CO/heat alarms).
• Test/Silence Button, temporarily silence or test the alarm with one-touch easy access button.
• Dust cover, keeps the alarm clean during construction.