Features: High quality, compact size, lightweight and portable, easy to carry around. The shell is made of carbide material, which is wear-resistant and can be used for a long time. Humanized design, one hand can easily hold the all-in-one welding pen, easy to master, no need to learn, no professional skills are required to be familiar with using the OLED display, you can see the delay time, power level, remaining power, battery voltage, battery recharging current. Strong electrical conductivity. Fine workmanship. Easy to use. Specifications: Material: Alloy Size: 8.2x14.8x2.7cm/3.22x5.82x1.06 inches Battery capacity: 10600mAh Note: Please allow 0-3mm error due to manual measurement, please make sure you don't mind before ordering. Package includes: 1 set of spot welding machine 20-speed adjustable spot welding machine