FIRST ALERT SC9120LBLA CO and Smoke Combination Alarm 0 - 120 VAC

Smoke and carbon monoxide alarm with dual ionization smoke sensing technology. Carbon Monoxide sensor. 120 VAC hard wired with battery backup. Interconnect with other smoke or CO units from BRK, American sensors, first alert. Battery is sealed, never needs replacing. End of life warning when it's time to replace the unit. Latching alarm indicator once triggered. Test/silence button.