Utilizing the explosive effect of the Nd: YAG laser, the laser permeate the epidermis into the dermis which includes amount of pigment mass. Since the laser pulses in nanosecond but with super high energy, the shot pigment mass swell quickly and breaks into small pieces, which will be eliminated through metabolic system. 1. Short disk width -picosecond level. Short sanding times, less skin damage 2.7.Joint arm imported from Korea, energy production is more stable and energy loss is less. 3. Honeycomb uniform objective makes the light around the energy more uniform 4. Point size (2-10) mm 5. Single pulse mode and double pulse mode in the operation of the screen. Single pulse is more explosive and suitable for removal of the tattoo. Double pulse is delicate and suitable for removal of the pigment.