Features Trigger Button: Handheld spot welding pen has a trigger button, press to weld once, very convenient, built in LED indicator. Voltage and Current: Automatic trigger handheld spot welding pen wire specifications for 12AWG silicone wire, using voltage of 12V‑16.8V, spot welding current of 80A‑150A. Size: The main body of the soldering pen is 25x170mm, the length of the wire is 350mm, and there are 3x1.5x40mm professional aluminum oxide copper alloy soldering needle, suitable for 18650 or 21700 battery pack. MOS Tube: Our automatic trigger handheld spot welding pen has a built in MOS tube, which can carry 550A current, integrated design, and can be used when connected to a battery. Stepless Adjustment: The auto trigger handheld soldering pen is removable and replaceable, 99 levels of stepless adjustment, more convenient to use. Specification: Item Type: Automatic Trigger Handheld Spot Welding Pen Wire Specifications: 12AWG silicone wire Power Interface: Copper ear Use Voltage: 12V-16.8V Spot Welding Current: 80A-150A Power Components: 550A MOS tube Shell Material: High temperature resistant nickel plated tape Spot Welding Material: 0.1mm nickel plated wire Package List:1 x Spot Welding Pen1 x Nickel Plated Welding Wire Package List 1 x Spot Welding Pen 1 x Nickel Plated Welding Wire