Hand-Held Carbon Dioxide Meter, Carbon Dioxide Concentration 0 to 9999 ppm, Temp. Range 14 Degrees to 140 Degrees F, Relative Humidity Range 0 to 95 Percent, Dew Point Range -4 to 139.8F, Wet Bulb Temperature Range 24.8 Degrees to 139.8 Degrees F, Humidity Accuracy +/-3 Percent (@25 Degrees C, 10 to 90 Percent) +/-5 Percent for Other RH Ranges, Accuracy +/-30 ppm +/-5 Percent of Reading, Display Triple Line LCD, Auto Power Off Yes, Low Battery Indicator Yes, Data Hold Yes, Data Storage Yes. This item has been restricted from sale in the following state (s): []