Features:
Rotating head to protect sensor
Jumbo display
Field calibratable with optional HR33 & HR75 references (see below)
Auto power off
Min/max
Displays: temp, humidity, dew point, wet bulb

Specifications:
Temperature range: -4 to 122° F (-20 to 50° C)
Humidity: 0 to 100%
Dew point: -90.4 to 122° F  (-68 to 49.9° C)
Wet bulb: -69 to 122° F  (-21 to 49.9° C)
Temp. accuracy ±1° F (±0.6° C)
RH Accuracy  ±3% @ 25° F
Resolution: 0.1; 0.1% RH
Response time: 60 sec.

*OPTIONAL ACCESSORIES (Required only if you need to check the RH calibration of the unit at your location.  Unit can also be recalibrated at your location with the references - The references are not required for the meter to work properly - this unit is fully calibrated as shipped.)

*HR33 'Low' Humidity Reference 

*HR75 'High' Humidity Reference

Supplied With:
2 “AAA” batteries