In the age of unlimited portability, it is more convenient to weld with a high-quality radio soldering iron. This mini soldering iron uses 5V DC power supply, and uses special built-in heat type soldering iron head, fast heat and concentration. Warm up in less than 15 seconds, cool down in less than 35 seconds can greatly improve your work efficiency. This soldering iron is small and light, it is convenient to put it in your tool bag and take it to your work place. Your computer, mobile power supply or mobile phone charger, etc. with USB cable. The indicator light will turn off and enter standby mode automatically when it does not work for more than 25 seconds. This function can better extend the service life of the welding head and save power, and it is safer. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.