AC Powered, Plug-In CO/Gas Combination Alarm

The KIDDE CO/GAS COMBINATION ALARM provides double the protection - detecting CO and explosive gases, like methane or propane. It even has a 9V battery back-up in case the lights go out. It's easy to install too - just plug it in to any AC wall outlet. Other features include a continuous digital display showing detected levels of carbon monoxide and a loud 85 dB pulsing alarm that sounds if a problem is detected. UL listed. Five-year limited warranty. 6 1/10 in L x 1 4/5 in H x 3 1/5 in W