Temperature Alarm, AC Voltage Accuracy Not Applicable, Alert Type Digital Display, Sound, Current Channels Not Applicable, Maximum Dew Point Measured 140 Degrees F, Minimum Dew Point Measured -40 Degrees F, For Phase Single, Calibration Certificate Type Not Certified, Minimum Sampling Rate 1 sec, Maximum AC Current Measurement Not Applicable, Maximum Relative Humidity Measured 90 Percent, Maximum AC Voltage Measured Not Applicable, Minimum Relative Humidity Measured 0 Percent