First Alert 10-Year Battery Photoelectric Smoke Alarm, Slim Profile vs First Alert SMCO210 / SMCO210V Combo

Side-by-side specs from each maker.

Only the differences are shown.

First Alert 10-Year Battery Photoelectric Smoke Alarm, Slim ProfileFirst Alert SMCO210 / SMCO210V Combo
TypeSmoke or CO alarmSmoke or CO alarm
Alarmsmokecombo
SensorphotoelectricPhotoelectric (smoke) and electrochemica
Power10-year sealed lithium battery10-year battery (lithium metal, not replaceable)
Standards (maker)Not listedConforms to UL 217 10th Edition Standard; Conforms to STD UL2034

First Alert 10-Year Battery Photoelectric Smoke Alarm, Slim Profile

A slim photoelectric smoke alarm with a built-in 10-year lithium battery that mounts on a wall or ceiling with a twist-lock bracket.

  • Photoelectric sensor
  • No battery changes
  • Half as thick as a standard alarm

First Alert SMCO210 / SMCO210V Combo

A battery-powered smoke and carbon monoxide combo alarm with a sealed 10-year lithium battery.

  • Sealed 10-year battery, no battery swaps
  • UL 217 10th edition and UL 2034
  • Slim profile