$29.99 First Alert SC9120B
Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup [1 Pack]
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First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide Alarm with Battery Backup
4.5 out of 5 stars 1,127 customer reviews
- 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
Hope this helps.
personal got 2