Product Information:About the Kidde KNCOPPBCarbon Monoxide Alarm, 9V Battery Powered w/ Digital DisplayThe Kidde KNCOPPB carbon monoxide alarm is a sophisticated sensory device that is ideal for detecting harmful levels of carbon monoxide in any residential dwelling. Unmatched sensor technology makes the Kidde KNCOPPB a powerful detector, yet a simple unit to manage. Simply plug the device into any wall outlet to begin protecting you and your family from carbon monoxide gasses.Featuring a digital display, the Kidde KNCOPPB is able to communicate alerts to you easily, with precise accuracy. The display updates every 15 seconds to provide uptodate results measuring from 11 to 999 parts per millions, giving you the advantage of always knowing the carbon monoxide levels in your house.Best of all, the Kidde KNCOPPB carbon monoxide alarm comes UL listed and backed by a fiveyear manufacturerrsquo;s warranty to ensure that you and your family are always protected against carbon monoxiderelated complications.Features:bull; Battery Operated: Provides best protection during power outagesbull; Digital Display: Shows CO level in PPM (parts per million). Updates digital reading every 15 seconds allowing you to see if levels changebull; Backlit Display: To help see the displayed reading in the dark, a backlight appears during the peak level cycle.