First Alert Smoke & Carbon Monoxide Detector | 10-Year Battery | SMCO210 | Slim Design

Stay safer in your home with the First Alert SMCO210 Smoke & Carbon Monoxide Detector, which combines both sensors into one sleek unit with a 10-year sealed battery. With its slim profile, this alarm fits neatly onto ceilings or walls without being obtrusive, yet delivers powerful protection against both smoke and dangerous carbon monoxide. The photoelectric smoke sensor is better at detecting smoldering, smoky fires, while the electrochemical CO sensor tracks invisible, odorless threats.

This unit measures about 5.7 inches across and 1 inch deep, and sounds an 85-decibel alarm to alert occupants well before a threat becomes severe. There’s a single test/silence button for regular testing and for silencing false alarms caused by cooking smoke or steam. It features an end-of-life warning that signals when the alarm should be replaced. Because the battery is sealed for 10 years, you won’t have to replace batteries or deal with constant low-battery chirps. Meets UL-217 and UL-2034 safety standards.

Easy to mount with the included bracket, this detector is ideal for bedrooms, common areas, and especially near sleeping spaces. Whether you're outfitting a new build or replacing old alarms, this combo unit offers dual protection in one reliable, low-maintenance device.

Key Features:

• Dual sensor: photoelectric smoke + electrochemical carbon monoxide detection
  

• 10-year sealed battery – no replacements or low battery chirps
  

• Slim profile design (~1 inch deep) blends discreetly into ceilings or walls
  

• Loud 85 dB alarm audible at ~10 ft to ensure early warning
  

• Test/silence button + end-of-life warning to alert when unit needs replacement
  

Add this SMCO210 detector to your safety plan to ensure years of reliable, dual protection with minimal maintenance.

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Returns of new, unused items are accepted for
a refund or exchange within 30 days of purchase. Read our return policy here.