The BRK SC9120B hardwire mix smoke and carbon monoxide gas alarm identifies 2 threats with one basic device. Carbon monoxide gas (CO) is a colorless, odor free, fatal gas. It can be produced by sources consisting of gas or oil heaters, gas clothes dryers, water heating systems, fireplaces, wood ranges, charcoal grills, gas ranges, and space heating systems. A clogged chimney, improper venting, and attached garages can likewise trigger carbon monoxide gas build-up. The BRK SC9120 hardwire mix smoke and CO alarm with battery backup includes these features: Quick plug-in power port for simple setup, 120-volt A/C inter-connectable (with optimum 18 suitable devices - 12 other suitable smoke alarms + 6 suitable devices like bells, horns, repeaters and door closers. If one device activates an alarm, all smoke alarms in the series will sound. Single test/silence button which both silences a non-threatening alarm or low battery caution and allows you to check the device's capability. Immediately carries out internal test of capability. Locking alarm sign which instantly determines which device started the alarm. Battery drawer lock and mounting bracket lock for tamper resistance. A/C power sign and alarm sign light. Low battery caution "chirp" and missing out on battery tab. 9-volt battery backup for peace of mind throughout power outages. All BRK Electronics carbon monoxide gas alarms are listed to UL Safety Standard 2034 for property carbon monoxide gas alarms. Includes 9-volt backup battery. 7-year minimal warranty. Includes: One mix smoke and CO alarm, one 9-volt battery, and user's handbook.
BRK First Alert SC9120B Smoke Carbon Monoxide Combo Combination