Laser date marking machine 1.Mark on all kinds of ... 24 h 3.CE Approved 4.Easy operate Laser date marking machineSampleTechnical parameters Input voltage:AC220V±20VFrequency:50HzInput power ... auto-coding, serial No., batch No., barcode, 2 -D code, etc. on metal or nonmetal surface (plastic, silicon or ... glasses, auto parts, telecommunications products, plastic buttons etc. Laser date marking machine