... increased, One-to-one service Portable ultrasonic welding machine,Spot welderMainly applicationSpot welding, riveting, screw imbedding, appliqu ... , small-sized, dust-proof, high performance 2:automatic frequency-tuned system: take PLL for the ultrasonic ... -3028/KLC-5028/KLC-8028Power300w,500w,800wVoltage220V/50Hz 110V/60HzOutput Frequency28kHz/35kHz/40kHzCohesion Specification1-15mmCooling modeFan ...