• Fire & CO Detector in 1 unit with alert modes, LED lights, & voice alarm, that states, "Fire! Fire!", "Warning! Carbon Monoxide!", or "Low Battery!"
• Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire
• Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup
• Test-Hush Feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling
• UL Certified, 10-year limited warranty
• Meets safety standards set by Underwriters Laboratories (UL) and interconnects with other KN-COSM-IBA models
• 120V AC, All Kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA

Looks and appears new, unused, and in excellent condition in an open box.