WSME series' inverting type AC/DC welder is a double function machine. Its biggest characteristics is that it can not only weld color metal ware with the direct current(DC) function such as stainless steel, metal alloy steel, carbon steel, copper and others, but also weld aluminum and aluminum metal alloy ware with the alternating current(AC) function. It is an ideal renewal welder in such profession as building decorating, container manufacturing, installation of machinery and equipment, car maintenance and skateboard car, bicycle etc. The whole power supply conversion rate of the welder is more than 85%. The welder increases efficiency and saves electricity. This user's manual can be the reference while the customer uses this product.