... accuracy,swift speed,no pollution,low noise,stable functionNo contact and machanical distortion,perfect design effect,easy to cut metal,alloy ... steel,spring steel,copper plate,aluminium plate,other metal plates and pipesTechnical Parameters:Max.Outout Power: 200W/400W/500WLaser Wavelength: ... /100ACooling System:Water cooling High Speed Galvo Laser Marking Machine for Mobile phone outside engraving