Gears 0-99, gear 1 is the lowest, gear 99 is the highest, increase the gears in sequence when using Suitable for 14650, 17490, 18650, 21700, 26650, 32650, etc. Cylindrical lithium batteries, metal hydride batteries, etc., can be spot welded firmly. Supports 0.1-0.3mm sheet spot welding MOS tubes*5. After 5 parallel connections, the theoretical maximum current can reach about 1700A. Five MOS tube positions are reserved on the back of the PCB. This is convenient for players who are familiar with electronic knowledge and have hands-on skills. Add MOS tubes by yourself to increase DIY fun. Bilateral outlet is convenient for spot welding. The product is marked and it is not easy to connect incorrectly 8 square meter spot welding pen, 10AWG wire, aluminum oxide copper spot welding needle, ensuring excessive current capability and durability, greatly improving spot welding efficiency, Weight: 0.38139971326 Pounds, Manufacturer: Kueohse