The U280-004-OTG is a 4-port USB charging hub with OTG. Used for charging tablets, phones or other mobile devices, all at the same time. It provides a single location to charge multiple devices and its sleek, compact design keeps charging area neat and clutter free. It features two 5V/2A ports and two 5V/1A ports, providing up to 6A for charging the connected devices. Comes with an internal power supply, eliminating the need to fumble around with bulky power adapters. When not being used for charging, it doubles as a USB OTG hub. Simply connect OTG compatible tablet or phone to the dedicated port on the hub and then connect up to four USB devices (flash drive, mouse, keyboard). Can now use those devices on tablet or phone. So whether you're at home or in the office, charging hub with OTG provides an ideal solution for charging devices or expanding the functionality of OTG compatible tablet or phone.