... PVC Welding Machine, Auto Hot-air Banner Welding Machine, Banner Jointer, PVC Jointer, Auto Jointer, Auto Hot-air Jointer, Banner Welding Machine, PVC Welding Machine, Hot-Air Welding Machine ... down the temperature, so to avoid scorches the fabric. But please don't worry, do not turn the button urgently ... If it is too slow, it will damage the fabric. But if it is too fast, it may not splice fasten ...