1Two motherboards are equal to two machines, each motherboard can control 32 perm rollers, two people perm when one with the left screen, one with the right screen. 2With measuring bar hole, can test the bar voltage, or bar short circuit can be called out by voice. 3If power switch and total safety machine panel did not respond, need to protect the seat and replace a new fuse. 4Equipped with 24V digital bar, it has more accurate temperature and can uniform heating. 5Comes with the 360 rotate wheel, this machine moved smoothly and flexible to turn around even in a narrow space.