1,Overload protection device 2,High working rate 3,High quality parts 4,Easy to operate 5,Extensive use function:1 ... Frame.3. Overload protection device, FET output part, mould frequency automatic chase.4. Portable design, the light, easy to carry, ... and other sports equipment widely used in ultrasonic plastic welding machine for plastic point welding, etc. Portable ultrasonic spot welding machine