The Kidde KN-COPP-3 AC powered plug-in carbon monoxide alarm utilizes sophisticated electronic components and unmatched sensor technology to protect you and your family from the dangers of CO. The Kidde KN-COPP-3 AC powered plug in carbon monoxide alarm provides you and your family with warning signal to protect against dangerous levels of carbon monoxide in your home. This alarm is easily installed in any of your AC wall outlets. The digital display feature allows for easy viewing of carbon monoxide levels from 30-999PPM (parts per million). The KN-COPP-3 includes a 9V battery backup that provides continuous monitoring of CO levels even during power outages when AC-only units are not providing protection. The KN-COPP-3 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. Features: Digital Display Displays the level of carbon monox