Since each pigment color absorbs a specific wavelength, PiQo4 offers 4 wavelengths in order to treat the broadest range of pigment/tattoo colors, on the widest range of skin types. Its four wavelengths – 1064nm, 532nm, 650nm and 585nm – target 9 of the most frequently used tattoo colors ranging from light orange to dark black. With PiQo4 you can erase the rainbow.