Kidde 9000146 Carbon Monoxide Alarm W/ Digital Display

Provides continuous monitoring of CO levels, even during power outages when many CO incidents occur. The backlit digital display feature allows for easy viewing of carbon monoxide levels from 30-999 PPM (parts per million). The 9000146 will also detect and store concentration CO levels, as low as 11 PPM and up to 999 PPM, with its Peak Level Memory display. Alarm includes a slide-out door for immediate access to the batteries and a safety feature that prevents closure when batteries are missing.