The Aqua Light Laser is an integrated typo of ER:YAG Laser and CO2 Laser. The ER:YAG Laser is used to cut the bone. The absorption rate of this laser is very high so if the laser is projected into the Water, hyperfine explosion may occur in the water molecule and we can remove the tissues by the supersonic wave(shock wave) This is also called the Photo - Acoustic effects. And a snapping supersonic sound occurs during the clinical operation, with minimal heat damage.