1. 99 adjustment, digital tube real-time display, gears 0-99, 1st is the lowest, 99th is the highest, increase the gears in turn when using 2. Using 5 MOS tubes: The control board of the spot welding machine adopts 5 MOS tubes. After 5 parallel connection, the theoretical maximum current can reach about 1700A. 3. 8 spot welding pen, 10AWG wire, alumina copper spot welding needle, to over-current capability and durability, greatly spot welding efficiency 4. Bilateral outlet, easy to spot welding, the product is marked, it is not easy to wrongly 5. Suitable for 14650, 17490, 18650, 21700, 26650, 32650 and other cylindrical lithium batteries, -hydrogen batteries, etc., can be spot welded firmly, support 0.1-0.3mm spot welding Product name: 99 spot welding machine Working voltage: 6.5V-16V Working current: Less than 20ma Standby consumption: Less than 0.5ma Recommended temperature: -10-60℃ Voltage: 12V Welding current: 1700A MAX Thickness of welded : 0.1-0.3mm (related to battery discharge energy) Capacity: 20AH-80AH ( battery no more than 45AH or: 4-5 strings of super capacitors) Prohibition: It is forbidden to switching supplies, , chargers, water batteries, and banks to supply ! Product size: 90x60mm Colour:Purple Material:PCB+Metal Package Contents: 1 x Control panel 2 x input line 2 x spot welding pen 2 x heat shrink sleeve 1 x screw pack 1 x 1 x Chinese and English manual Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.