Rated input power: 4kw. Frequency: 50 / 60Hz. Number of capacitors: 3 820uf. Current regulation range: 20-250a. Welding material thickness: 2-5mm. Electrode diameter: 2.5 long welding / 3.2 spot welding. Product size: 200mmx88mmx120mm / 7.8inx3.5inx4.7in. Package Included:(as your choose, please sure, thanks). 1 x Welding Machine. 1 x Ground clamp. 1 x Welding tongs. 1 x Pair of gloves.