Digital Hygrometer, 0 to 100 Percent Relative Humidity Range, +/-2 Percent Humidity Accuracy, -20 Degrees to 140 Degrees Temp. Range (F), +/-0.9 Degrees Temp. Accuracy (F), Yes Dew Point Range, Memory 99 Typical Individual Date/Time-stamped Readings, Battery Type 9V, Data Hold Yes, Data Logging No, Includes Wrist Strap