First Alert Combination Smoke Carbon Monoxide Alarm, 120V AC, 9V Battery Backup, 6 Pack - SC9120B

First Alert Combination Smoke Carbon Monoxide Alarm, 120V AC, 9V Battery Backup, 6 Pack - SC9120B

$50.99
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First Alert Combination Smoke Carbon Monoxide Alarm, 120V AC, 9V Battery Backup, 6 Pack - SC9120B

First Alert Combination Smoke Carbon Monoxide Alarm, 120V AC, 9V Battery Backup, 6 Pack - SC9120B

$50.99

First Alert SC9120B is a hardwired ionization smoke and carbon monoxide combination alarm with a 9V alkaline battery backup. It includes a latching alarm indicator, single-button test/silence control, and an end-of-life signal.

  • Pack quantity: 6
  • Power: 120V AC with 9V battery backup
  • Carbon monoxide sensor: Electrochemical
  • CO sensor and end of life: 10 year
  • Side-load battery drawer
  • Universal mounting bracket
  • Quick-Connect wiring harness
  • Tamper-resistant locking pins
  • Includes dust cover
  • Low-battery chirp silence: Up to eight hours
Free U.S. shipping $75+$4.95 flat on orders under $75
Ships in 5-7 business days7-10 business days in transit
30-day returnsFull details below
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Shipping, returns & fit

Shipping is free on U.S. orders of $75 or more; orders under $75 ship for a flat $4.95. We currently ship to U.S. addresses only.

Orders are picked and packed within 5-7 business days. Once shipped, delivery normally takes another 7-10 business days, and you'll receive a tracking link by email. Full details on our Shipping Policy.

You have 30 days from delivery to return any unworn item with tags in its original packaging. Return postage is paid by the buyer, unless your item arrived damaged, wrong, or never arrived — in those cases we replace it or refund you in full and cover the postage.

Approved refunds go back to your original payment method within 5–10 business days. See the full Refund Policy.

Available sizes are listed on this page. Between sizes? Email us and we will help you choose. Colors may vary slightly between screens and batches. Natural variation in materials is part of the character, not a defect.

Call +1 212-673-5372, email support@cobblestonesvintageclothing.com, or use our contact form. A real person reads every message, Tue-Sun, 1 PM - 7 PM ET — usually answered the same business day.

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