Firex Smoke Detector, Hardwired with 9-Volt Battery Backup, Smoke Alarm, 6-Pack
Includes 6 units ($10.83 /unit)
$64.99 /case
Save up to $100 on your qualifying purchase 
Apply for a Home Depot Consumer Card- Smoke alarm operates on a 120V wired powered source
- 9-Volt alkaline battery provides protection during power outages
- Interconnection capability, so when 1 alarm sounds, they all do
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