First Alert SA521CN-3ST Smoke Alarm Battery Operated 120 Volt Winter_Items providing double zinc coating for

providing double zinc coating for maximum rust resistance and long life

Color : White/Brown painted

Wheel Diameter: 4-1/2"

Includes tank

Strike can be mounted either on the gate or the post

First Alert SA521CN-3ST Smoke Alarm Battery Operated 120 Volt Winter_Items providing double zinc coating for"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