... USB port or using the optional external charger;13. Backlight for convenient use in dark environments; 14. Software calibration ... ,HB,HSMeasuring Range/MaterialsSee table 1Display 112×64 LCD with backlightDisplay functions DHardness scale,Hardness value,average value, impact ... COutputUSBTestable work pieceThickness coupled: Minimum 3mm or more( Except with impact device G:10mm) Mass:5kg or more(2-5kg ...