This portable USB Hub turns one of your computer's USB ports into four (4) for device charging and data distribution. We have added a Micro USB port for additional power insertion that can be accomplished using the provided external power supply. Easily add up to 4 devices with the Liberty USB Hub, now every port is equipped with USB 3. 0 technology which is capable of transferring data at speeds of up to 5gbps. The combination of having a USB-A or USB-C using an adapter allows one device to be compatible with a variety of personal devices saving time, confusion, and cost.