Vibration Meter, Acceleration Range 656ft/s2, 200m/s2, 20.39g, Frequency Range (Hz) 10 to 1 kHz, Temp. Range (F) 14 Degrees to 140 Degrees , Velocity 0.5 to 199.9mm/s, 0.05 to 19.99cm/s, 0.02 to 7.87in/s, Bearing/Gear Check Yes, +/-(5 Percent + 2 Digits) Accuracy, Yes Data Hold, Display LCD, Auto Power Off Yes, Special Features RMS, Peak Hold and Max/Min Record, Metric or Imperial Measurement Units, (6) AA, Calibration Certificate No