99-level power adjustment digital tube displays real-time gear positions, 0-99 gears, 1st gear is the lowest, 99 gears is the highest, and the gears increase sequentially. 5 MOS tubes are used, and the control board of the spot welding machine uses 5 MOS tubes. After 5 parallel connections, the theoretical maximum current can reach about 1700A. 8 square spot welding pen 10AWG wire, aluminum oxide copper spot welding needle, current capacity and durability, greatly improve spot welding efficiency. Upgraded to an automatic trigger design, no need to press for a long time, completely freeing your hands. and portable, stable and reliable, wear-resistant, long service life. Product name: K99 gear spot welding machine Working voltage: 6.5V-16V Working current: less than 20ma Standby power consumption: less than 0.5ma Recommended operating temperature: -10-60C Voltage: 12V Welding current: 1700A MAX Welding brocade thickness: 0.1-0.3mm (related to battery discharge energy) Prohibited items: It is forbidden to use switching power supplies, , chargers, electrical appliances, water batteries, and mobile power supplies for power supply! size: 9 x 6 x 3cm Material: pcb colour: As shown Package Contents: 1 x control board 2 x input line 2 x spot welding pen 2 x heat shrinkable sleeve 12 x screw 4 x nut 3 x 8 x copper column 2 x acrylic board Only 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.