Wide choice of welding power source, 18650 lithium battery power supply or 12V car battery. The controller adopts single-chip microcomputer control, the output pulse is accurate, and the welding quality is guaranteed. The controller has an LCD display screen that can display welding parameters. The soldering pen and the input wire are connected by U-shaped cold-pressed terminals, which is convenient for disassembly and replacement. The controller adopts automatic welding , while retaining the manual interface. The controller is mainly for welding 0.1mm-0.15mm nickel-plated steel strip. The energy must gradually increase from 01, and the maximum cannot exceed 50. Otherwise, the controller will be damaged. Specification: Material: Metal Input Voltage: 1V Maximum Welding Thickness: 1mm Power: 1W Rated Input Current: 1A Rated Input Power Capacity: 1KVA Size Chart: Size: 7x5x3cm/2.75x1.96x1.18inches Package Includes: 1 Piece Spot Welding 2 Pieces Soldering pen 2 Pieces Power cord 1 Piece Manual Note: Please allow 1-3 cm/ 0.39-1.18 inch difference due to manual measurement and 3-5 g/ 0.007-0.01lb/ 0.11-0.18oz for the difference between different colors. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!