- Pixel laser -Wave Length: 2940nm -Best choice for Skin rejuvenation - Word lead technology, reliable qulity,reasonable pric Principle:Erbium Yag laser are solid-state lasers, it typically emit light with a wavelength of 2940nm, which is infrared, and the frequency of Er:Yag laser is strongly absorbed by water nearly 100% because of its absorption peak. The human skin contains lots of water, so ...