The Kidde 900-0076 (Model KN-COPP-3) is a 120 V AC powered, plug-in carbon monoxide alarm with battery backup and a digital display. The KN-COPP-3 is an easy to install unit that provides reliable protection against the dangers of carbon monoxide. The 900-0076 will detect and store measured data of concentrated CO levels as low as 11 and up to 999 PPM with its peak level memory display. This alarm gives you several mounting options, including: direct-plug, a 6' power cord or table top. The 900-0076 is suitable for all living areas and has a 10-year limited warranty.