Electrical Testing Tools features:This is a portable electric welding machine. It precisely controls the output current of the MOS tube through a single-chip microcomputer, and generates a high temperature of more than 2000 degrees at the soldering point to make the nickel sheet weld firmly. The welding machine itself has functions such as over-current protection, low-voltage protection, over-voltage protection, over-temperature protection, etc., which can ensure safe use. FeaturesColor: BlackMaterial: Aluminum alloySize: About 10/3.93X2.75X0.98inchBattery capacity: 5000mAHWelding thickness: 0.1-0.15mmMade of aluminum alloy material, fine structure, wear resistance and can provides long service time. The solder pen make of premium material, durable and with fine conductivityIt has the characteristics of light weight and small size, which is convenient for you to carry and useWith the function of a power bank, you can charge your mobile phone at any timeWith short-circuit protection, we can use it more safely.