Function this product adopts piezoelectric effect of artificial polarized ceramic for design. It is suitable for monitoringall kinds of vibrating mechanical facility, specially the vibration measurement of rotating and reciprocating machinery. The unit can measure acceleration, velocity and displacement, which is widely used in mechanical manufacture, electric power metallurgy and general aviation etc.Features1: simple to use, the structure is compact, portable for2: carrying along with measurement.3: visually display measurement value and state.4: acceleration, velocity and displacement measurement.5: different vibration frequency selection.6: high sensitivity probe for accurate measurement provides7: long and short probe head , each one is suitable8: for different situation measurement.9: equipped with ac signal output interface.10:low power indication.11:auto power-off.12:lcd backlight.