& Carbon Monoxide Detector, Hardwired with Lithium Battery Backup, Interconnect Combination & CO Alarm with Voice Alert, model P4010ACSCO-W, is an AC-wired alarm that operates on a wired, 120VAC power source with a sealed, lithium battery backup. Using photoelectric sensor technology, wired alarm detects visible fire particles associated with smoldering fires. combination CO detector provides continuous protection from poisonous carbon monoxide, even during power outages. A red LED will flash & be accompanied by 3 long alarm beeps followed by a verbal warning that warns of fire, carbon monoxide, & low battery. Hush feature silences fire alarm for approximately 9 minutes. A maximum of 24 devices can be interconnected in a multiple station arrangement, but cannot exceed (National Fire Protection Association) limit of 18 initiation devices, of which 12 can be alarms. With 18 initiating devices (smoke, heat, CO, etc.), interconnected, it is still possible to interconnect 6 strobe lights and or relay modules. UL Certified with a 10-year limited warranty. Meets requirements of UL 2034, UL217, NFPA72, State of Fire Marshall, 101, FHA, & HUD.

Fire & CO detector in 1 unit with alert modes, LED lights, & voice alarm, that states, "Fire! Fire!", "Warning! Carbon Monoxide!", or "Low Battery!"
Photoelectric sensor technology – detector detects visible fire particles, 85 decibel alarm alerts of fire
Protects during a power failure – combo and CO detector operates on a 120VAC power source with lithium battery backup
Test-Hush Feature – silences unit for approximately 8 minutes; tamper-resistant technology deters removal of unit from wall or ceiling
UL Certified, 10-year limited warranty