The servo motor has high efficiency, 20k2000W ultrasonic wave, four-point simultaneous welding, and good stability. The length of mask rope can be adjusted at will. Automatic mask putting device, 6 equipment and 1 worker can get it. Small size and exquisite, simple operation. The system adopts single chip microcomputer, which can be updated, updated and optimized at any time. Disposable mini-point headset four points.