Testing Featurespalm Size for Narrow Space.test At Any Angle, Even Upside Down.direct Display of Hardness Scales Hrb, Hrc, Hv, Hb, Hs, hl.large Memory Could Store 250 Groups Including Singlemeasured Value, Impact Direction, Material and Hardnessscale Etc.user Recalibration Function Allowed.can Communicate with Pc Computer for Statistics Andprinting By the Optional Cable.manual or Automatic Shut Down.low Battery Indication.