... 2.Water cooling system 3.Diode pump laser 4.CNC control Laser marking machine SampleTechnical parameters Input voltage:AC220V±20VFrequency:50HzInput ... or auto-coding, serial No., batch No., barcode, 2 -D code, etc. on metal or nonmetal surface (plastic, silicon or porcelain ... , jewelry, glasses, auto parts, telecommunications products, plastic buttons etc. Vin Code laser marking machine