... spot size 12*15mm 5.OEM, ODM Hot selling in America! Newest high quality diode laser hair removal machine Working TheoryLasers and light ... ,hight quality;2. Touch screen,sapphire crystal,integration skin cooler,human-centered design for the interface,all these make the treatment ... effective wavelength for the hair removal.There is one more filter crystal added in the front of the diode laser emitter, ...