Sapphire freezing point painless hair removal is the most advanced permanent laser hair removal method. According to the principle of selective photothermal, a revolutionary use of sapphire laser hair removal equipment is used. purpose of hair removal. With a unique cryoprotection device and sapphire treatment bald head, the local skin can be cooled to 5 degrees Celsius, just like summer, the snowflakes are cold and completely pain-free. It is cool and painless on a large area, removes excess hair, effectively protects the surrounding skin, and removes hair quickly.