engrave 2D or 3D picture in transparent materials Item Parameter Laser Medium Nd: YAG Laser Wavelength 532nm Laser Frequency 100Hz Maximum Engraving Range 300X300mmX90mm Maximum Engraving Speed 4000-6000dots/min Continuous Working Time 12hrs Maximum Power of the Whole Machine 4 KW Number of Laser Heads 8 Weight of the Whole Machine 260 kg Dimension of the Whole Machine 980mm?60mm?200mm Water Medium Deionized water or pure water Cooling Medium R407C