Characteristic and use: Uses the new transformer and the unique structure of box, is advantageous for moving, has the handle and foot wheel, is advantageous for moving. Welding material: Low-carbon steel, high-tensile steel, medium-carbon steel, Low-alloy structural steel Limited conditions: To use the machine better, please observe the following condition: A ambient temperature is situated between-10degree centigrade and 40degree centigrade; B operational site altitude above sea level does not surpass 1000M. C In the surrounding air dust, the acid, the caustic gas or the matter and so on do not surpass the normal content, except in the welding process. D Not suitably in the air with salt to use long time. E The voltage undulation supplied by power is in rated value+-10%. F The operational site wind power is lower than for 1.5m/s. G Does not suit to use or work in the rain.