Fast heating and coolingThis mini soldering iron adopts a5V DC power supply and uses special internal heat type soldering head, fast heat, and concentration. Heating up in less than 15 seconds, Cooling down in less than 35 seconds, which can greatly improve the efficiency of your work. Enough heat can weld various kinds of wires and objects. The features of fast heating and short waiting time allow you to melt the soldering iron quickly and save working time. It is not only widely used, long-lasting work, but easy to hold and use. This soldering iron is small and light, it is convenient to put in your tool bag and carry to your working place. USB cable, which can be powered by computer, mobile power supply or cell phone charger and so on . When it is not working for more than 25 seconds, the indicator light will turn off and enter standby mode automatically. This function can better prolong the service life of the soldering head and save energy, and it is safer. This USB soldering iron can be widely used for small caliber circuits, home appliance accessories, soldering, jewelry repairing, DIY lovers, and so on. Convenient and practical, it is a perfect gift for your friends in need.