Features: 20 Power Gears: 20 gears of powers adjustable design, the welding process is more accurate and the welding effect is more perfect. Delay Times Adjustable: 29 gears of delay times adjustable, easy to adjust according to the welding effect. Digital display: with digital tube real-time gear display function. Current Voltage Parameters: 7-14V wide input voltage design, 100-300A applicable operation current, support welding 0.1-0.15mm nickel sheet. Recommended power supplys: 12Volt car starter power supplys, 12Volt 20-60AH leadacid battery with nice performance. Selected MOS Tubes: output through 5pcs MOS tubes, with 2600A max welding current. 350mm Welding Pen: consists of multiple strands of high temperature wire with fine torsional resistance ability, the operation is more sensitive. 2mm welding-pin: with fine conductivity and low contact resistance, quickly detachment and easy carrying. Cold pressing process: large area contact with pure copper joint, reduce internal resistance. Complete Set of Accessories: with nonslip flange-nuts and screws to increase the over-current area. Specifications: Name: Spots Welding Module Material: printed circuit board+metal Working current: 100-300A Service voltage: 7-14V Item size: 80 * 44mm / 3.15 * 1.73in Package size: 100 * 60 * 10mm / 3.94 * 2.36 * 0.39in Package weight: 125g / 4.41ounce Packing List: 1 * Welding Circuit Board 2 * Heat-shrink Tube 2 * Input Cable 2 * Welding Pen 4 * Screw 1 * 5m Nickel Sheet