1. Encoder flexibly adjusts welding strength 2. Adjustable screen display of current size, welding pulse, interval, and spot welding count 3. Battery voltage display 4. Support foot switch(Wire socket 3.0mm) 5. Adopting 5 -power MOS, MOS boost circuit drive, ensuring MOS stability, paired with 2 large filter capacitors, high-performance anti-interference MCU. Paired with 8AWG silicone welding wire Important note: 1. This product only includes the control board and elding pen, and does not include the power supply, battery, or aircraft model battery 2. Support voltage 7V-14V, current 200A 3. Suggested power input: Car starting power supply 12V 20A-200A Super capacitor 3 in series -6 in series Aviation model battery 3S 5000mah or above 4. Attention: Reverse connection of the positive and negative poles of the power supply can burn out the control board Colour:Blue & Transparent Material:PCB+brass+plastic+electronic components Package Contents: 1 * Spot Welder Controller 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.