This portable Nd:Yag laser device adopt the Q switch technique ,emits coherent collimated and monochromatic light of 1064nm or 532nm laser,make the laser energy at pole the in a short time release, becoming the huge pulse,but very short pulses of laser light which pass through the skin to break down the particles of tattoo pigment, which are then removed by the white blood cells and the lymphatic systems.Solid-state laser green environmental protection machine.