First Alert SA521CN-3ST Smoke Alarm Battery Operated 120 Volt Car Wax - Paste Offers primary and secondary thermal

Offers primary and secondary thermal safeguard protection if normal operating temperatures are exceeded

Includes support package and termination parts for a chimney that is supported by a flat ceiling and that passes through an attic area and penetrates the roof

U-shaped door bottom with drip cap

Handle size: 10"

firm surface

First Alert SA521CN-3ST Smoke Alarm Battery Operated 120 Volt Car Wax - Paste Offers primary and secondary thermal"FIRST ALERT" SMOKE ALARM 120V AC DC Easily expand an existing interconnected 120V AC system by replacing one alarm in the series with this alarm Add additional battery operated First Alert Onelink enabled alarms to expand without wires Photoelectric smoke alarm reduces nuisance alarms Alarm and low battery silence feature 10 year limited warranty