Features: Brand new and high quality Lightweight and portable, stable and reliable, wear resistant and can provides long-time. Fuses the nickel sheet firmly with the battery. The welding current approx. 90-150A, which is more than enough to welding common 0.1mm-0.12mm nickel plate. Every 3 seconds, switches between 1-gear power-2-gear power-3-gear power-4-gear power The green flashes once (output low-power spot welding pulse once every 3 seconds), the green flashes twice (output medium-power spot welding pulse once every 3 seconds), the green flashes threetimes (output high-power spot welding pulse once every 3 seconds), and the red light on (automatic spot welding in 4th gear, press it for about 1 second). Every spot welding output, the buzzer rings briefly. The indicators light flashes green. Specifications: Material:Alloy+copper +PVC+ electronic component System voltage: 12-14.6V Working current: 90-150A Battery recommendation: 20-45ah lead-acid battery with good performance and small internal resistance; 3.5-5.5ah 45C model battery pack. Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Spot Welding Machine