First Alert SCO501B2 Review – Onelink Wireless Talking Battery Operated Smoke And Carbon Monoxide Alarm

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First Alert SCO501B2 model is a professional dual smoke and carbon monoxide sensing alarm, it is designed to give the ultimate protection from two deadly dangers. It has built-in photoelectric smoke sensor to detect smoke and electrochemical sensor to measure carbon monoxide level in the air.

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  • Wireless interconnectivity
  • Can connect up to 16 Onelink alarms
  • Talking alarm
  • Eco-friendly


  • NA


SCO501B2 Battery Operated Smoke & Carbon Monoxide Alarm uses a ONELINK wireless alarm which has wireless interconnectivity. It allows a maximum of 16 ONELINK alarms connected together. As a result, when one alarm is triggered and give warning all alarms in the connected circle will sound together. This give extra protection to the whole house.

First Alert SCO501B2 alarm uses a special talking alarm, it allows voice to be programmed to each of the alarm. There are a total of 11 pre-programmed choices to be used if you don’t want to use your own voice. When alarm is triggered, the programmed voice will notify the area it is detected and what type of danger it detected. A loud 85 dB sound will be triggered as well.

The photoelectric smoke sensor in the SCO501B2 reduces the chances of false alarm. A lot of low quality smoke alarms trigger alert when it detected cooking smoke or shower stream. On the other hand, the built-in electrochemical sensor also gives more accurate tracking of the carbon monoxide level.

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The First Alert SCO501B2 smoke and CO alarm has a easy access battery drawer, you can easily change the battery without removing the alarm from the ceiling. First Alert SCO501B2 has been tested pass the UL217 & UL2034 standards and also FCC compliant. It comes with 5 years warranty and it is a common practice to change any smoke or carbon monoxide alarms every 5 years in order to have maximum protection.

For the safety of family members in your house, it is advisable to have few units of First Alert SCO501B2 smoke and carbon monoxide alarm at kitchen, bedroom and living area. It is a co-friendly alarm and it is completely recyclable.

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