Features: DC5V 8W USB welding pen welding repair tool set Adjustable power canbeadjusted freely between 3.3-4.8V through the knob Portable mini soldering iron battery with a capacity of 1300mAh Wide application: soldering iron tool commonly used for welding circuit board, DIY enthusiasts, jewellery welding, device repairs. Suitable for soldering starters. Refer to the instructions for use:After receiving this product, screw on the soldering iron head and quickly press it 5 times within 2 seconds to turn iton. The bottom can rotate 3.3-4.8V to adjust thevoltages. It is recommended to adjust it to themaximum. When using it, hold down the power button and the indicators light will light up. This machine has a 10 second timeoutprotection function Specifications: Item:Portable Mini Soldering Iron Pen Material： Alloy Power：DC5V 8W Charging:USB Battery :1300mAh Including 1 Soldering Iron, 1 Usb Power Cord, And 1 Bracket Product Size approx: approx 4x15x25cm/1.57x5.9x9.84in Package Includes: 1PC Soldering Iron 1PC Usb Power Cord 1PC Bracket note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item. 3. If removed midwayduring charging, the host indicators light may remain on and the button may malfunction. In this case, simply screw on the soldering iron head 4.Attention: Do not tighten the soldering iron head too tightly