The CO71A monitors, records and alerts you to the presence of dangerous carbon monoxide in ambient air. The visual display constantly indicates precise quantities while the audible and visual alarms respond to various threshold levels. Long Life Ambient CO Detector
UEi Test Instruments" Carbon Monoxide Detector, 0 to 999 ppm Detection, Alarm: Audible/Visual, 9 VDC Alkaline Battery Power Source, LCD/LED Visual Alert, 10 to 90% RH Humidity, LCD/LED Back-Lit Display, Specifications Met: ASHRAE Standard, OSHA Approved, 32 to 104 deg F Operating, Synthetic Case, Yellow, 6-1/4 in L x 2-1/2 in W x 9-1/2 in H Dimensions