First Alert BRK 9120B Hardwired Smoke Alarm with Battery Backup

$23.99 (as of November 14, 2018, 4:19 pm) & FREE Shipping. Details $11.29

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Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there’s a power failure
Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm