First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Auto Accessories Drop-forged jaw is heat-treated to

Drop-forged jaw is heat-treated to resist distortion or breakage

The ergonomic handle is perfect for comfortable all-day use

Clear hardwood provides a durable residential threshold

Shell Rotella® T4 Triple Protection shows significantly improved resistance to oil breakdown under high temperatures

First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Auto Accessories Drop-forged jaw is heat-treated toCarbon 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