Carbon Monoxide Monitor

Alternately displays Carbon Monoxide (CO) concentration, Air Temperature, and Relative Humidity readings (cycles approximately every 6 seconds)Visible bright tri-colored (green, yellow, red) LED alarm indicatorAdjustable audible alarm for readings exceeding one of the selected ranges: 25ppm, 30ppm, 35ppm, 50ppm, 100ppm or 200ppmZERO Re-Calibration functionManual Temperature and Relative Humidity Compensation (adjustable)CO Calibration function in fresh airLow battery indicatorComplete with universal AC adaptor (including US, EU, UK, and AU plugs), and 4 AAA batteries