1.Adopt IGBT technology 2.CCC/CE/ISO certificate 3.Warranty: ... 15 days 5.MOQ:1 for sample Product Description:Adopt IGBT inverter technology, brief and easy electronic circuit, compact, light ... no-load loss, compared to traditional welder, it can save electricity about 50%.Inverter frequency reaches 20Khz, high dynamic response, ... , please feel free to contact us. ARC-250 (IGBT) Inverter DC Arc Welder