AW2020P Ultrasonic Plastic Welding Machine Features of AW series Frequency and output: typically, 20khz to 15khz, with output power varying1500 watt to 4200 watts Input power: usually required 220 voltages with current rating from 10 amp to 20 amp. Welding area: can accommodate work pieces up to 300mm in size Control system: feature multiple protection circuit, and easy frequency adjustment digital presentation of working condition.