This machine apply to produce seamless underwear,seamless bra.seamless windproof,waterproof garments. environmental bag.etc.Features: 1) auto sealing,no tape needed,no heating needed. 2) welding immediately auto cutting 3) easy to change cutter 4) 35000/s frequency 5) one key work,no adjust insert to work 6) stepless shift pedal auto adjust environmental design work no acoustic radiation