Shared four-wire and full mirror design. This mini power bank with Led light and display screen has many advantages, such as digital display, multiple interfaces for fast charging, compact and portable, which can be used on airplanes, overvoltage protection, temperature protection, and compatibility with most electronic products on the market. Compact design enable you put it in your backpack or pocket wherever you go. They are best gifts for cell phone users, now, give him or her a best gift in a special day!