This product offers dual protection as it is designed ... The photoelectric smoke sensor in the First Alert alarm meets both UL217 and UL2034 standards, which are the safety standards for smoke ...

Stay prepared with the most reliable smoke detectors for fire and carbon monoxide detection -- tested and recommended by our ...

There are two different types of smoke alarms—single-sensor ionization and single ... Similar to our First Alert combination smoke and carbon monoxide alarm mentioned earlier, this is a ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.