Features:  High quality material: this lightweight, portable spot welder is made of solid, durable aluminium alloy housing, with anodic oxidation surface, wear-resistant.  Efficient welding: it is with total 5 gears of output power, easily adjustable, for precise welding; and there are LED light to indicate the working gear.   Good performance: welding pen, with gold-plate terminal, long enough, flexible to use, quick to install, fine conductivity, ensures beautiful welding spots.  Safe, reliable use: the welding machine has low voltage, over current and over-charge protection, low battery alarm function, auto-off under low power.  Power bank function: built-in rechargeable battery, 5000mAh high capacity, supports it to fast charge the mobile devices via 5V 2.1A USB port, very convenient.    Specifications:  Material: aluminium alloy  Color: black  Current: max 650A  Battery: 3.7V 5000mAh battery  Item Size: 10.3*8.4*2.7cm / 4.06*3.31*1.06in  Package Size: 10.3*8.4*2.7cm / 4.05*3.30*1.06in  Package Weight: 400g / 14.10oz    Note:  Spot welder set only, other accessories in the pictures are not included.  Due to lighting or other reasons, the picture and material object may slightly differ.  Due to manual measurement, there may be deviation, please in kind prevail.    Packing List:  1 * Spot Welder  2 * Welding Pen  1 * Charge Cable  1 * Nickel Sheet