Feature : 1. Rechargeable: This 5V 15W soldering iron built in a 1100mAh rechargeable battery, can be connected to a computer, power adapter or mobile phone charger for charging, about 2 hours per charge, and can work continuously for 40 minutes 2 . Voltage adjustment: the knob on the bottom of the soldering iron allows you to adjust the voltage in both directions, and the adjustment range is 3.3-4.8V 3 . High heating temperature: the heat of this welding tool is up to 842 or 470, press and hold the switch button for 8 seconds to heat up quickly, repeat this operation to continue heating 4 . 510 thread interface: standard 510 thread interface can connect copper alloy soldering iron tip and USB charging cable 5. Safety protection: press and hold the power button of the soldering iron for more than 10 seconds, the battery will start the time-out protection function and automatically enter sleep mode 6. Usage: This soldering tool is lightweight and easy to carry, suitable for DIY design, electronics soldering, jewelry repair, electrical accessories, circuit board repair, etc. Specification: Item Type: Rechargeable Soldering Iron Material: copper alloy, stainless steel Temperature range: 200 to 470 Heat up time: 8-12s Soldering iron tip resistance: 1.5-2.5 Ω Battery: 1 x 13700 lithium battery (built-in) Battery capacity: 1100mAh How to use: 1. Screw on the soldering iron tip, press 5 times in quick succession within 2 seconds to turn on and the indicator light flashes several times. 2 . Keep pressing the power button is heating, release the button to stop heating. 3 . Keep pressing the power button for more than 10 seconds, the battery will start the timeout protection function. Press and hold for about 8 seconds, release the button and press it again about 8 seconds apart, repeating for continuous heating. Package List : 1 x rechargeable soldering iron 1 x USB charging cable 1 x soldering iron tip 1 x soldering iron tip storage 1 x Manual 1 x soldering iron holder