The vertical-cavity surface-emitting laser, or VCSEL , is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge-emitting semiconductor lasers (also in-plane lasers) which emit from surfaces formed by cleaving the individual chip out of a wafer. The System use high-power super-emitting chips as a light source, crystal guide pyramid shaping and transmission of NIR beam, act on subcutaneous, melanin in hair follicle absorb heat.