for mobile use mark numbers,name,trademark logo,icon apply to metal,glass,ceramic,plastic,etc. no need to connected with PC Technical Parameters:Print Range140mm × 80mm (special format can be customized)Marking Speed2-4 per second (4 # characters)Marking Depth0.01-2mm (depending on material hardness may be)Marking Accuracy4μmClick Frequency300 ± 10HzAdjust Range≥ 0.01mmNeedle HardnessHRA92Gas ...