Specifications: Material: Aluminum alloy Color: Black Current: Max. 650A Battery: 3.7V 5000mAh battery Item size: 10.3 * 8.4 * 2.7cm / 4.06 * 3.31 * 1.06in Package size: 10.3 * 8.4 * 2.7cm / 4.05 * 3.30 * 1.06in Features: High quality material: This lightweight portable spot welder is made of solid durable aluminum alloy case with anodic oxidation surface, wear-resistant. Efficient welding: with total 5 gears of output power, easy to adjust, for precise welding; and there is LED light to indicate the working gear. Good performance: welding pen, with gold-plated connector, long enough, flexible to use, quick to install, good conductivity, ensures beautiful welding points. Safe, reliable use: The welding machine has low voltage, overcurrent and overcharge protection, low battery alarm function, automatic shutdown when power is low. Power bank function: Built-in battery, 5000mAh high capacity, supports fast charging of mobile devices via the 5V 2.1A USB port, very convenient. Package includes: 1 * Spot welder 2 * Welding pen 1 * Charging cable 1 * Nickel sheet