... 2.Water cooling system 3.Diode pump laser 4.CNC control Laser marking machineSampleTechnical parameters Input voltage:AC220V±20VFrequency ... environment-friendly. 4. Its mainly equipped with the international advanced semiconductor light-emitting diode. diode laser module, scanner head, beam expander, ... , auto parts, telecommunications products, plastic buttons etc. YAG laser marking machine with CE