... :1500W 3)Voltage:220V CE Approved Ultrasonic Spot Metal WelderFeaturesl the welding time is short, without any ... , redcopper, bronze, nickel, gold high-conductivity metal weldingSolid solder joint, solder joint resistance is small, no traces of oxidation, ... fast, beautiful, safe, easy to operate.Welding range:Battery pole piece of metal ...