1. Wide selection of welding power supply: lithium battery power supply or 12V car battery.2. The controller is controlled by a single chip microcomputer, and the output pulse is accurate to ensure the welding quality.3. With LCD display screen, can display welding parameters.4. The welding pen and the input line are connected by U-shaped cold-pressed terminals, which is convenient for disassembly and replacement.5. Using automatic Press welding mode, while retaining the manual trigger interface, you can choose according to your own use.Input line length: app.20cm/7.87inLength of welding pen: app.30cm/11.81inColour: redMaterial: metalPackage Contents:1 x controller2 x soldering pens2 x power input lines (red and blue)1 x manual (Chinese and English)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.