... ,HV,HS 2.Display:segment LCD MH180 portable metal hardness testerTechnical Specifications:Measuring range: (170-960)HLD,(17-68.5)HRC,(19 ... -100)HS,(59-85)HRA,(13-100)HRBMeasuring direction:360°Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HSDisplay:segment LCDData ... hours(With backlight off)Communication interface:RS232 MH180 portable metal hardness tester