Features: This portable spot welder machine is a game-changer for DIY enthusiasts and professionals alike. With its compact design and built-in power supply, you can now easily weld- nickel sheets. DIY spot welding, which combines the built-in power supply and the welding pen into one, without the need for an external welding pen to easily weld-, make your spot welding project easier and safer. The integrated soldering pen uses gold-plated terminals, with good conductivity and low contact resistance. Miniature USB charging interface is adopted for easy charging. Fine workmanship and good-performance.Easy to use&Long service life.. Specifications: Material: ABS Model:HW-401 Size: about 249.7x57.83x24. 45mm/9.84x2.27x0.96in Charging:MicroUSB 5V Battery:18650 Lithium- Battery Note: Do not for touch-any metal parts of the fuselage- with a welding pen. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Thank you. Due to the differences of camera equipment, light intensity and display screens, the color of the item may be slightly different from that shown in the pictures. Package includes: 1 PC x Mini Spot Welder