The Extech VB500 can display four (4) channels of simultaneous vibration measurements taken from remote vibration sensors. This meter displays and stores vibration readings of Acceleration, Velocity and Displacement. Supported measurement units are meters/s2, ft/s2, g, mm/s, cm/s, in/s, mm and inch. Logged data readings are stored on an SD card for transfer to a PC. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.