First Alert SC9120B-12ST Combo Smoke & Carbon Monoxide Alarm Cotter Pins 7 days a week

7 days a week

It is 100% renewable and needs no power to operate

And it weighs an easy-to-manage 4

maximum shielding

Water Required For Regeneration: 12

First Alert SC9120B-12ST Combo Smoke & Carbon Monoxide Alarm Cotter Pins 7 days a weekHighlights: 120V AC 60 Hz with 9 volt battery back up Intelligent sensor reduces nuisance alarms Silence test button Ionization smoke sensor Tin oxide sensor permanently stores highest carbon monoxide reading Automatically performs internal test Interconnectable with BRK smoke and CO alarms Power indicator Battery drawer Quick connect plug with 8" pigtails Universal mounting bracket with screw slots Does not meet code in "Massachusetts" Note: