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About this item

• Hardwired CO smoke alarm features battery backup for constant monitoring
• Can connect to other compatible BRK or First Alert CO smoke detectors
• Lights indicate if the alarm is for smoke or for carbon monoxide
• Single test silence button for simple operation
• Side-load battery compartment for convenience

The First Alert BRK SC-9120B Hardwired Combination Smoke and Carbon Monoxide Alarm uses electrochemical CO sensing technology and Ionization sensor for smoke detection. This hardwired dual CO smoke alarm can be connected to other compatible BRK or First Alert hardwired CO smoke detectors within a single-family residence.