Engrave 2D or 3D picture in transparent materials Item Parameter Laser Medium Nd: YAG Laser Wavelength 532nm Laser Frequency 3000Hz Maximum Engraving Range 60mmx60mmx85mm Maximum Engraving Speed 120000-180000dots/min Continuous Working Time 12hrs Maximum Power of the Whole Machine 1 KW Number of Laser Heads 1 Weight of the Whole Machine 170 kg Dimension of the Whole Machine 750mm?50mm?220mm Water Medium Deionized water or pure water Cooling Medium R134A