DGL Group, LLC 4 Port USB 2.0 Smart Hub (VA-4HB-MMU) Each USB 2.0 port is capable of data transfers up to 480mbps. Attach card readers, flash drives, mice, keyboards, etc.. This hub wont block adjacent ports. Works best when plugged into a USB 2.0 hub on your notebook/laptop/desktop. Also comes with a micro USB port and a mini USB port, making it perfect for cellular devices.