First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Drill Bits Passage knobs do not lock

Passage knobs do not lock and are used in bedrooms and closets

in length providing more access in tight spaces

Fasco F3p-Fn-50

and 3 mounting screws

Recommended for use on any properly prepared exterior wood

First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Drill Bits Passage knobs do not lockCarbon 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