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First Alert 3-pack hardwired smoke and CO detector

First Alert ★ 3.8/5 · ItemOracle Score Premium

$210 USD
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FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

Three hardwired smoke and carbon monoxide alarms with battery backup. Electrochemical CO sensing plus ionization sensor and 85 dB siren. Easy installation into existing wiring harness; provides constant monitoring during power failure

Highlights

  • hardwired with battery backup
  • electrochemical CO sensing
  • fits existing wiring harness

Pros

  • 3-pack for multi-room coverage
  • hardwired with battery backup
  • electrochemical CO sensing
  • ionization sensor for fast-burning fires
  • indicator lights show smoke/CO status

Cons

  • mixed reviews on battery life

Best For

  • basement safety monitoring
  • main living area protection
  • multi-room home safety
  • backup for power outages
  • wiring-harness compatible replacement
  • new construction or retrofit installation

Features

  • Three-pack hardwired smoke and carbon monoxide alarms with battery backup
  • Electrochemical CO sensing plus ionization sensor for fast-burning fires
  • Face indicator lights show smoke or carbon monoxide presence; 85-decibel siren sounds
  • Interconnects with compatible BRK or First Alert detectors so all alarms sound together
  • Single test/silence button for simple operation

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