Feature: 【6 Gears Adjustable Output】6 levels of output power are adjustable, the lowest level is 1 level and the highest level is 6 levels (red indicator light), no need to be pressed, more precise and more stable. 【Two Output Modes】Automatic mode: the spot welding pen will be automatically detected.When both welding pens touch the metal,it will be output once.; Manual mode:press the manual spot welding pen once every short time to output the spot welding pen once. 【Quick release Welding Pen】The 40cm integrated welding pen is made of low-resistance oxygen-free copper material, which is stable in welding. Gold-plate terminal, with fine conductivity and low contact resistance, quickly detachment and easy carring. 【7500mAh Large Capacituy Battery】The spot welder has a built-in 5000mah high-rate polymer power battery. It can be fully charged within 3 hours. Thousands of points can be welded continuously after being fully charged. 【Safety Protection】It has the functions of over-current protection, low-voltage protection, over-voltage protection and over-heat protection. Intelligent output current can ensure safe use. Specifications Adjustable gears:1-6 Gears Adjustable Welding thickness:0.1-0.15mm Battery: 2 * 5V, 7500mAh battery (included) Output Voltage4.2V (max) Welding Output Current:650A (max) Charging Port:Type -c usb input Current:5V, 2A Spot Welding Pen Length:about 40cm Package List: 1 * Spot Welding Machine 2 * Spot Welding Pen 1 * Nickle Sheet 1 * Type-c USB Cable 1 * Metal File 1 * Manual