Hardness tester LK110A 1,Measuring scope:(170-960) HLD; ... , HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, can detect ... the needs of the sitePrinting Paper Width: (57.5 ± 0.5) mm; Print Roll Diameter: 30mmOperating Voltage: 6V ... packCharging Power Supply: 9V/500ma; Charge Time 2.5 ~ 3.5 hourscontinuous working time: about 150 hours (not print, ...