MH180 portable metal hardness tester 1.Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HS 2.Display:segment ... )HS,(59-85)HRA,(13-100)HRBMeasuring direction:360°Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HSDisplay:segment LCDData memory ... :max. 100 groups(relative to impact times 32~1)Working voltage:3V(2 AA size alkaline battery)Continuous working ...