This document provides information about the CO5120BNA carbon monoxide alarm. The alarm uses a standard 9V battery as a backup power source to an AC power connection. It has features like a quick-connect wiring harness, universal mounting bracket, and pivoting battery compartment. The alarm is interconnectable with up to 12 other alarms and has a test/silence button. It monitors CO levels and is designed to alarm before levels become life-threatening according to safety standards.