1.12V-16.8V input, wide power supply adaptability, optional car emergency start power supply, car battery, high-rate battery pack for model aircraft, etc. (must have good performance, at least the level that can start the car) 2. Built-in MOS tube, built-in low-resistance high-power MOS tube can withstand 500A current, low heat generation (conventional spot welding current is about 80-150A) 3. More than 99 levels of stepless adjustment, suitable for commonly used 0.1mm nickel-plated sheets, if 0.2mm superposition welding is required 4. The power adjustment knob simplifies the complexity, the counterclockwise power is small, and the clockwise power is , stepless adjustment 5. The trigger button, each time the welding pin is pressed, outputs a high-energy pulse, and the welding efficiency is free, and it has an output pulse indicator light (light color yellow/green in different batches will be shipped randomly , don't accept the specified) 6. This product is very suitable for electronic enthusiasts to assemble or DIY lithium battery packs. With the design concept of simplifying complexity and leaving meaningless fancy functions, everything is centered on convenience and practicality. Body size: 25mm x 170mm Wire length: 350mm Wire specification: 12AWG silicone wire Power interface:Copper Ears Use voltage: 12V-16.8V Spot welding current: 80A-15OA Power component: 550A MOS tube Welding needle specifications: 3MM x 1.5MM x 40MM professional aluminum oxide copper welding needle Other remarks: The copper needle is a standard part and can be replaced The supporting nickel sheet is a nickel-plated steel strip with a width of 6mm and a thickness of 0.1mm, and the length of each roll is about 6 meters; Colour:grey Material:plastic Package Contents: 1 x soldering pen 1 x nickel sheet (width 6mm, thickness 0.1mm, length about 6m) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.