Measures RMS Acceleration and Velocity. The VB400 is designed to provide easy and accurate velocity and acceleration measurements on industrial machinery. Measurement ranges including Acceleration (RMS): 656ft/s2; 20.39g; 200m/s2; and Velocity (RMS): 7. 87in/s; 2.00cm/s; 200mm/s. Wide frequency range from 10Hz to 1kHz. Lt has resolutions of 1ft/s2; 0.01g; 0.1m/s2 and 0.02in/s; 0.01cm/s; 0.1mm/s. Basic accuracy of ±(5% + 2 digits). Additional features include Zero adjustment, Data Hold, and Low battery indicator. Water and dust resistant to IP65. Complete with test pin tip, magnetic base, 4 × AAA batteries, and pouch case.