The LogiLink CQ5107S is a four port USB 3.0 hub with built in card reader, designed to add additional USB ports to devices such as desktops, laptops, and Macs. It features LED indicators to show connection status, a power switch to save energy when not in use, and support for multiple memory card types. It is compatible with Windows, Linux, and Mac OS X operating systems. With four USB ports and a card reader, the CQ5107S provides flexible and convenient connectivity to peripherals and devices.