This portable machine works by laser, non-contact marking, marking is clear and good quality letter display. Suitable for all metals and alloys (iron, copper, aluminum, magnesium, zinc ), rare metals and alloys (gold, silver, and titanium), ABS materials (electric appliance casing and daily necessities), and other coating materials. Applicable to electronics, machinery, hardware, printing and jewelry industries, etc. This machine can mark text, date, QR code, barcodes, serial numbers, graphics, etc. Meet different industry marking demands.