Carbon Dioxide Meter, Calibration Certificate Type Available Separately, Digital Display Screen Type LCD with Backlight, Features 15 Minutes Short-Term Exposure Limit Value, Data Hold, Manually Calibratable, Selectable Display of Dew Point and Wet Bulb, Time-Weighted Average Display for 8 Hr Period, Includes Carrying Case, Maximum Carbon Dioxide Measured 9, 999 ppm, Maximum Carbon Monoxide Measured Not Applicable, Maximum Dew Point Measured 139.8 Degrees F, Maximum Oxygen Measured Not Applicable. This item has been restricted from sale in the following state (s): []