• First Alert SCO403 Alarm Combination Pack

The SC0403 is a combination pack of Carbon Monoxide (CO) and smoke alarm. Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air. The unit monitors and re-alarms if carbon monoxide levels persist sounding a loud 85-Decibel horn. No installation is required and the attractive design allows the unit to be placed anywhere you need it. It includes an optional wall mount with no outlet required. An audible and visual low battery signal alerts you to replace the battery. Pull down action chart has convenient guide on what to do if an alarm sounds. No one wants to think about a fire in their home, but being prepared and recognizing signs of danger early can help keep you and your family alive and safe. The First Alert smoke alarm with silence button allows you to both silence a non-threatening alarm and to test the unit's functionality. It features a low battery alert to remind you when to change the battery and has a missing battery guard to ensure that a battery is placed inside the alarm. The side battery drawer slides open for easy battery replacement. A blinking power indicator on the unit confirms that it is receiving power. The alarm contains an optional pin to lock the battery and unit in place for tamper resistance. It can be mounted on either the ceiling or the wall and can be used in mobile homes and RVs. It includes one 9-Volt battery and has a 5-Year limited warranty. UL listed for safety

  • Includes battery-operated carbon monoxide alarm and battery-operated smoke alarm
  • Modern, compact CO detector design with no installation required, electrochemical sensor
  • Smoke alarm uses ionization smoke sensing technology
  • Simple to use silence/test button, low battery warning, end-of-life timer, 85 decibel alarm
  • Two 9V batteries included, 5-year limited warranty


Part NumberSCO403
Item Weight13.6 ounces
Product Dimensions9.8 x 6.9 x 3.5 inches
Item model numberSCO403
Power Sourcebattery-powered
Item Package Quantity1
Batteries Included?Yes
Batteries Required?Yes
Warranty Description5-Year

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First Alert SCO403 Alarm Combination Pack

  • from First Alert
  • Product Code: FTSE5220
  • Condition: BRAND NEW
  •  In Stock.
  • $37.89   + 7.99 Shipping