1、ALL IN ONE SPOT WELDING PEN: Adopt gold plated pen tip and copper pen barrel, copper oxide aluminum welding needle, grasp every detail, only for your experience 2、THICKENED AND WEAR RESISTANT: 2MM thick copper over current bar with ultra low internal resistance increases over current capability, gold plated soldering pen terminals are made of copper and gold plated technology, wear resistant and rust proof, with ultra low internal resistance 3、TEMPERATURE CONTROL PROTECTION: Automatic power off when the temperature exceeds 60℃. The portable spot welding machine has perfect overcharge, overdischarge, overtemperature and other protection functions and double protection performance. Unique overheat protection device, automatic power off when overheated 4、6 SPEED ADJUSTABLE: 6 speed output power is adjustable, welding is more accurate and stable. Automatic and manual modes are adjustable for easy operation 5、WIDE APPLICATION: Suitable for 18650 and other cylindrical lithium batteries, nickel hydrogen batteries, and cadmium nickel batteries, and can be welded firmly. Can also be used to weld iron, steel, stainless steel plates with thickness less than 0.2mm/0.007in to other iron, steel, stainless steel materials. Saving your time and effort 1 x Host2 x Welding Pen1 x File1 x Nickel Sheet3 x Board1 x User Manual Item Type: Mini Spot WelderType C Input: 5V 2AMaximum Output Voltage: 4.2VOutput Maximum Instantaneous Current: 650ABattery: 2 x Polymer lithium battery 5000mahApplicable: 1. 18650 and other cylindrical lithium batteries, nickel hydrogen batteries, nickel cadmium batteries, etc. 2. Mobile phone battery cells, spot welding 3. Stainless steel sheets with a thickness of no more than 0.12mm