Model: welding machine control board Material: printed circuit board Working voltage: 8-24V Working current: Less than 20mAh welding current: maximum 2400A Standby power consumption: Less than 0.5mAh Welding thickness: 0.1-0.2mm Limit temperature: 175℃ You can choose one of the following power supplies as the working power supply: 1. Lead-acid battery: 2x20Ah electric vehicle battery, 36-405H car starting battery. 2. Model battery: 3S 4000mah 35C, 3S 5000mah 25C, 3S 8000mah 20C. 3. Car starting power supply: 11.5-14.8V 36-60AH, internal resistance should be 2.5 milliohms and Less than 7 milliohms. 4. Self-assembled battery: 11.5-14.8V, total internal resistance Less than 7 milliohms. Colour:Photo Color Material:ABS Size:89x54mm/3.50x2.13 inches Package Contents: 1set x spot welding machine (Different batches, accessories style and color are random,Accessories styles and colors are random, no specified styles and colors are accepted) 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.