... matrix with back-light, showing all functions and parameters.Converts to all common hardness scales (HV, HB, HRC, HRB, HRA, HS ... .7 types of Impact Device optional, which don't need to be recalibrated when changing them.Memory of 600 groups data ... read out directly when D/DC impact device is used to measure “cast steel” work piece.Printer be separated from main unit ...