1.Small and portable,The instrument is compact, portable and integrated without connecting cables, which have high reliability 2.Industrial bright OLED display ,It can also be displayed under direct sunlight clearly, suitable for various light conditions 3.The accurate and high-precision measuring circuit ensures that the value error is ±0.5%(HLD=800) and the value repeatability is 0.8% 4.Support a variety of hardness HLD,HRC,HRB,HRA,HB1,HB2,HV,HSD 5.Automatic calculation,The average hardness can be calculated automatically