... cooling 4.spot size 12*15mm 5.OEM, ODM Hot selling in America! Newest high quality diode laser hair removal machine Working TheoryLasers ... ?1. The semiconductor laser is made in Germany,hight quality;2. Touch screen,sapphire crystal,integration skin cooler,human- ... -checking function for the complete machine;5. The self-protection function for the complete machine,like water circle,circuit,voltage, ...