DGL Group, LLC High Speed 4 Port USB 2.0 Hub (VA-4HB-MMI) 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 an iPhone or iPod compatible port, making it perfect for cellular devices and mp3 devices.