Hardness tester LK110A 1,Measuring scope:(170-960) HLD; 2,Hardness formats: ... ,HB, HRB, HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, can detect various ... ; Print Roll Diameter: 30mmOperating Voltage: 6V Ni-MH battery packCharging Power Supply: 9V/500ma; Charge Time 2.5 ~ 3.5 hourscontinuous working ...