Digital read-out from 30-999 PPM warns of even low carbon monoxide levels;Updated digital reading every 2-1/2 minutes lets you see if levels change;Never needs recalibration;Advanced long-life state-of-the-art sensor;Peak level memory display shows highest CO reading since unit was last reset

• Kidde 900-0056 Nighthawk Carbon Monoxide Alarm

Kidde 900-0056 Nighthawk Carbon Monoxide AlarmKidde