1. Features -Simple menu, easy and convenient to use. -Conversion of common hardness scales (HL, HV, HB,HRC,HRB,and HS)&conversion of tensile strength -Screen display showing all the important values and information (including values.mean value(MEAN), numbers of measuring(NO.), date, impact direction, materialstested, hardness values and so on) -7 types of optional impact devices, with auto recognition, universal standard Dtype included -High accuracy and various material options for testing including Steel and Caststeel, Forged Steel, Cold Work Tool Steel, Stainless Steel, Gray Cast lron,Nodular Cast lron, Cast Aluminum Alloys, Brass (Copper-zinc alloys), Bronze(copper-aluminum/copper-tin alloys), Wrought Copper Alloys) -Measuring direction: any direction 360°even with probe pointing upIndication for charge and easy change for rechargeable batteryPrinter included and test values can be printed directlySoftware calibration -Auto power off