4-port USB hub: 1) Fully compliant with USB1.1 and USB2.0 2) Single chip integrated USB hub controller with embedded proprietary processor 3) Supports four bus-powered/self-powered downstream ports 4) Driverless, hot plug and play 5) 4 USB ports for varieties of external USB devices connection demand 6) Driverless (P&P) for Windows XP, 2000, 98SE, Linux2.4 and Mac OS 8.5 version 5 in 1 card reader: 1) Supports 5 kinds of digital memory cards listed as below: SD, mini SD, MMC, micro MMC, T-flash 2) USB 2.0 transfer rate up to 480Mbps, backward USB 1.1 transfer rate up to 12Mbps 3) View and edit file directly on the memory card 4) The fourth USB port on the right-top and card reader are controlled by one carder reader/USB hub converter controller, instead of other 3 USB ports 5) Do not withdraw memory card when reading data otherwise it may cause damage of memory card or data loss Mouse pad: 1) Black compact panel with smoothly movement which suitable for all kinds of mechanical mouse or optical mouse pad 2) Flash blue light or seven color light around the pad 3) Dimensions: W248 x D213 x H18mm