99 gears adjustment digital tube real-time display, gears 0-99, 1st is the lowest, 99th is the highest, and the gears are increased in turn.Using 5 MOS tubes, the control board of the spot welding machine adopts 5 MOS tubes, and the theoretical maximum current can reach about 1700A after 5 parallel connection.8 square spot welding pen 10AWG wire, aluminum oxide copper spot welding needle, to excessive current capacity and durability, greatly improve the efficiency of spot welding.Upgrade to an automatic trigger design, no longer need to press for a long time, completely free your hands.Lightweight and portable, stable and reliable, wear-resistant, long service life.Product name: K99 spot welding machineWorking voltage: 6.5V-16VWorking current: Less than 20maStandby consumption: Less than 0.5maRecommended operating temperature: -10-60CVoltage: 12VProduct size: 90x60mmWelding current: 1700A MAXWelding brocade thickness: 0.1-0.3mm (related to battery discharge energy)Capacity: 20AH-80AH (the new battery does not exceed 45AH, if it exceeds 45AH, please contact our customer service to inquire about the current limiting ) or: 4-5 strings of super Farad capacitorsProhibition: It is forbidden to use switching supply, transformer, charger, appliance, water battery, bank to supply Colour:As shownMaterial:PCBPackage Contents:1 x Control Board2 x 10AWG Input Cable2 x Spot Welder Pen2 x Heat Shrink Sleeve6 x Screw1 x Nickel SheetOnly 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.