Extech Heavy Duty Vibration Meter measures Acceleration, Velocity, and Displacement plus built in PC interface. Ranges ö Acceleration: 200m/s2, Velocity: 200mm/s, Displacement: 2mm. Remote vibration sensor with magnetic adapter on 39 inch (1m) cable. Record mode stores the maximum and minimum values for later recall. Wide frequency range of 10Hz to 1kHz. Resolution to 0.5m/s2, 0.5mm/s, and 0.005mm. Basic accuracy of +/ (5 percent + 2 digits). RMS or Peak Value measurement modes. Data Hold freezes the reading in the display. Auto shut off saves battery life. 9V battery power or optional AC adaptor. Built in RS 232 PC serial interface with optional Data Acquisition Software.