Function: 1. BATTERY POWERED: 5V 15W cordless soldering iron, built-in 1100mAh battery, with USB interface, charging for about 2 hours, continuous use for 40 minutes. 2. ADJUSTABLE VOLTAGE: The knob at the bottom of the soldering iron can adjust the voltage in both directions, ranging from 3.3-4.8V and heat output up to 842 470. 3. 510 thread interface: the soldering iron is made of stainless steel, the 510 thread interface can connect copper alloy soldering tip and USB charging cable. 4. EASY OPERATION: Press the switch button 5 times continuously within 2 seconds, turn it on, the indicator light will be on, and it will enter sleep mode automatically within 10 seconds. 5. Specification: Item type: soldering iron Material: aluminum alloy, stainless steel Battery: 1 x 1100mAh 13700 lithium battery (built-in battery) Temperature range: 200-460 Heat up time: 8s-12s Solder tip resistance: 1.3-2.1 Ω Size: approx. 17cm / 6.7in Package List: 1 x electric soldering iron 1 x USB charging cable 1 x solder wire 1 x solder wire storage box 1 x User Manual 1 x solder frame Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.