Features: Brand new and high quality. The welding control module is developed for DIY or simple battery spot welding. It is mainly used for welding nickel-plated sheets for single batteries or battery packs, such as 18650 lithium battery nickel plating 0.15 and 0.2mm steel sheets; a 500W transformer can be welded directly. It is intended for welding other battery materials and various thicknesses, such as polymer battery electrodes without nickel plating, and must be combined with a sufficient power transformer for welding. Can be set to save the last operation, the module's dual pulse trigger, turn off any set of triggers for time, you can change the dual pulse to single pulse trigger. Multi-group data 12864 visual display, intuitive operation, convenient, simple encoder parameter adjustment can make the operation simple and fast. With 0-9999 welding counting function, with 5 groups of sample storage parameters, can be stored even when the power is off, the number of welds can be seen at a glance. Specifications: Current: 40A / 100A (Optional) Display: 12864 LCD screen Display board size: 85 x 45 mm/3.39x1.77 inches Main board size: 85 x 45 mm/3.39x1.77 inches Package size: 10 x 9x 2 cm/3.93x3.56x0.79 inches Package weight: 74-86g Package includes: 1 x Main board 1 x Display board 1 x Cable Note: Due to problems with lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1 cm error due to manual measurement. The module has mains voltage compensation function, so the voltage calibration must be performed when the first machine is installed, and in the future, as long as the module's power transformer is not replaced, there is no need to recalibrate. Of course, when you feel that the display voltage is inaccurate, it can be calibrated.