... which is definitely suitable for fine model engraving processing centers, gift shops, craft shops, photo printing shops, wedding photography, souvenirs, ... portable 3d laser crystal engraving machine: 1. CE,FCC, FDA approved, 2.This machine can engraving both 2D nad 3D ... pulse energy1.2MJ1.2MJLaser power 3W3WQ-modeAcousto –optic Q-switchAcousto –optic Q-switchPulse width7ns7nsBeam quality m2<1.5 m2<1. ...