【Rapid heating, temperature adjustable】This mini soldering iron adopts a 5V DC power supply and uses the special internal heat type soldering head, heat fast, and concentration. Heating up in less than 15 seconds, Cooling down in less than 35 seconds, which can greatly improve your work efficiency. 【Cordless and portable】This soldering iron is small and lightweight, it is convenient to put in your tool bag and take to your workplace. USB cable, which can be powered by a computer, mobile power or your mobile phone charger, etc. 【Safe shutdown design】 When it is not operated for more than 25 seconds, the indicator light will turn off and automatically enter sleep mode. This function can better extend the life of the soldering head and save energy, and it is safer. 【Perfect Repair Tools】This USB soldering iron can be widely used for small-caliber circuits, household appliance accessories, welding, jewelry repair, DIY enthusiasts, etc. Convenient and practical, it is a perfect gift for