Pros

  • Straightforward installation process, especially for existing First Alert models.
  • Clear instructions provided along with necessary components like batteries and wiring adapters.
  • Reliable dual functionality for detecting smoke and carbon monoxide.
  • Battery backup feature ensures continuous protection during power outages.
  • Reasonable price, particularly when purchased in multacks.
  • High consumer satisfaction regarding longevity and features like dust covers.

Cons

  • Minor challenges with wiring during installation.
  • Need for potential buyers to verify compatibility with existing wiring systems.

Bottom Line

The First Alert SC9120B is a reliable choice for smoke and carbon monoxide detection, offering easy installation, long-term performance, and good value.

Lowest at Amazon
$56.24 at Amazon
Lowest at any Popular Retailer
$49.98 at Walmart
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