Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si The ultra-thick copper tube 10AWG welding wire and the alumina copper spot welding needle the overcurrent capability and durability, and greatly the spot welding efficiency. Pure copper conduction heat conduction greatly improves spot welding efficiency. 8 speed adjustment digital tube real-time display. High frequency capacitors have low internal resistance and can withstand high temperatures of 105 degrees Celsius. Both sides of the outlet are convenient for spot welding, and there are labels, which are not easy to wrongly. Specification: MOS core operating temperature: 175 Vds: withstand voltage up to 40V Rds(on): Single chip internal resistance as low as 0.77mR : single overcurrent capacity 300A Colour: green Material: Metal Package Contents: 2 x Connection cable 2 x Spot Welding Pen 1 x W1 Motherboard 1 x 5M 4 set x Stainless Steel Screws 2 x Heat Shrink Sleeve Only the above package content, other products are not included. Note: Light 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.