First Alert® SC9120B Smoke/Carbon Monoxide Alarm w/Battery Backup, 120V N/A Oil Filter/PVC:

Oil Filter/PVC:

60Hz with photocontrol option

3/16" x 1" x 48"

Each set includes 25 long life C9 painted ceramic bulbs on a green wire stringer with 25 sockets that are spaced 12" apart

two plates deliver a total of 8

First Alert® SC9120B Smoke/Carbon Monoxide Alarm w/Battery Backup, 120V N/A Oil Filter/PVC:The First Alert Hardwire Combination Smoke Carbon Monoxide Alarm wires directly into your home's electrical system. In the event of a power outage, this alarm has been equipped with a 9V battery backup to provide optimal protection. The realization of ionization technology combined with an electrochemical sensor ensure optimal safety. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms brought on by cooking smoke and