Specifications: Measuring Ranges: Acceleration (Peak): 0.1 ~ 400 m/s² Velocity (RMS): 0.01 ~ 400.0 mm/s Displacement (Peak – Peak): 0.001 ~ 4.000 mm Frequency: 1Hz ~ 10KHz Speed: 60 ~ 99,990 RPM Power Supply: 4 x AAA size batteries Auto Power Off: Yes Maximum Hold: Yes Low Battery Indicator: Yes Overall Accuracy: ±5% +2 digits Operating Temperature: 0 ~ 50°C Output: AC 2V peak – full scale (10k? impedance) Display: Large 4 digit LCD Size: 124 x 62 x 30mm Weight: 120g without batteries Supplied c/w carry case, accelerometer, cable, magnet, needle, headphones, batteries and manual