CO (Carbon Monoxide) Monitor Features

• 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 indicator
• Adjustable audible alarm for readings exceeding one of the selected ranges: 25ppm, 30ppm, 35ppm, 50ppm, 100ppm or 200ppm
• ?ZERO? Re-Calibration function
• Manual Temperature and Relative Humidity Compensation (adjustable)
• CO Calibration function in fresh air
• Low battery indicator
• Complete with universal AC adaptor (including US, EU, UK, and AU plugs), and 4 AAA batteries