First Alert Hardwire Combo Alarm
Hardwired combo smoke and CO alarm with battery back up
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Description & Features+
Hardwire battery back up smoke and CO alarm with quick plug-in connectors for easy installation can be interconnected with up to 12 BRK smoke alarms and 6 additional devices. Latching alarm indicator identifies initiating alarm. Alerts when it is time to change battery.
From the Manufacturer +
Q & A+