First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Category_Roofing Materials 3-in-1 blade mulches

3-in-1 blade mulches

2-1/8" x 2-3/8"

Black Polyethylene Film

waterproof

Wood Floors and Glass

First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Category_Roofing Materials 3-in-1 blade mulchesCarbon monoxide & dual ionization smoke sensor Separate visual and audible smoke and carbon monoxide indication to eliminate confusion Intelligent Sensing Technology for fewer nuisance alarms Smart 3 wire interconnect Quick Connect wiring harness for connection to AC power 85dB horn and 9V battery backup 2 silence features: Can silence the low battery chirp for up to 8 hours or temporarily silence an unwanted alarm Interconnectable with up to 18