... High quality ultrasonic digial flaw detector A36 Characteristic:1:10 points of DAC curve function,auto-generated evaluation line, sizing line,rejection line. ... rectification:positve,negative, fullwave,RFLCD display:5.7 inch high brightness TFT LCD,640*480 pixelsMeasurement model: Flank ... flaw detector A36 Picture of packing case: Quality certificate: High quality ultrasonic digial flaw detector A36