... constant and concentrative arc, TIG WELDING DEVICE WSM315 Spec. of TIG WELDING DEVICE WSM315: ModelSpec.WSM315Power supply voltageAC 380+15 ... 330 x 540 x 600 Features of TIG WELDING DEVICE WSM315:1. IGBT inverter technology and precision constant current ... technology, soft switch, high working efficiency;2. Wide working voltage range, strong adaptability to electricity power grid fluctuation, excellent ...