... cooling 4.spot size 12*15mm 5.OEM, ODM cheap 808nm diode laser machine for hair removalWorking TheoryLasers and light sources use the principle ... of the skin.Why Beijing Starlight Diode Laser?1. The semiconductor laser is made in Germany,hight quality;2. Touch screen,sapphire crystal ... crystal added in the front of the diode laser emitter,which means that the 808nm is filtered by double filters, this ...