Nearly all your mobile gadgets plug in to your computer through USB. You can make quick and convenient connections through the In-Desk USB HUB for your flash drive, camera, and more...And save space around your computer. The Hub easily fits into a 3.15 - inch -round opening on your desk or other surface, and connects directly to your companter with the included USB cable In-desk 3-port USB HUB(USB2.0)+Card reader+Audio 1) Extent your USB port 3USB port), Connect any USB devices via USB ports 2)data transfer rate up to 480 Mbps 3) put in your computer desk round hole location, tidy up your computer desk 4)Directly read SD/MMC/SDHC/Mini SD/MS/MS PRO/MS Duo /MS PRO duo 5)one Audio in-put port, one Audio out-put port 6)really plug & play at windows 2000 or above