Features: 100% brand new and high quality The spot welder- control module is developed for DIY or simple battery welder-. It is mainly used for single battery or battery group nickel plated sheet welding, such as 18650 lithium battery nickel plating 0.15 and 0.2mm steel sheet, 500W transformer can be welded directly. It is intended to weld other battery materials and different thickness, such as polymer battery electrode without nickel plating, must be combined with sufficient power transformer to weld. Multi-group data 12864 visual display, intuitive operation, convenient, single encoder parameter adjustment can make the operation simple and fast. Can be set to save the last operation, this module single pulse trigger, the main board and the display operation panel are separated, and the outer casing can be flexibly assembled. Three groups of data digital tube display, operation intuitive, convenient, single encoder parameter adjustment can make the operation simple With 0-9999 welding counting function, with 5 groups of sample storage parameters, can be stored even the electricity power is off, the number of wleding could be seen just by a glance. Package Includes: 1 x Main Board 1 x Display Board 1 x Cable Specifications: Current: 40A / 100A(Optional) Display: 12864 LCD Display Display Board Size: 85 x 45mm/3.39x1.77in Main Board Size: 85 x 45mm3.39x1.77in Package Size: 10 x 9x 2cm/3.93x3.56x0.79in Package Weight: 62-74g note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. The module has the network voltage compensation function, so the voltage calibration must be carried out when the first machine is installed, and in the future, as long as the module power transformer is not replaced, there is no need to recalibrate. Of course, when you feel that the display voltage is wrong and it can be calibrated.