Features and advantages: 1) 5 in 1 card reader: a) Support 5 kinds of digital memory cards listed as below: SD, mini SD, MMC, Micro MMC, T-flash b) USB 2.0transfer rate up to 480Mbps, backward USB1.1 transfer rate up to 12Mbps c) View and edit file directly on the memory card d) 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 port e) Do not withdraw memory card when reading data otherwise it may cause damage of memory card or data loss 2) 4-port USB hub: a) Fully compliant with universal serial bus specification version 1.1 and 2.0. b) Single chip integrated USB hub controller with embedded proprietary processor c) Supports four bus-powered/self-powered downstream ports d) Plug and play e) USB 4 ports for varieties of external USB devices connection demand f) Driveless support for Windows XP/2000, Linux 2.4 and Mac OS 8.5 version,Window 98SE supported with USB device driver 3) Stereo speaker: a) USB stereo speaker powered by USB or external power supply b) Inner USB stereo speaker suitable for listening Internet radio or stereo music c) Outer mini microphone built for Internet charting, no need earphone d) Earphone, microphone output connection capability e) Suitable for CD player, MP3 and MP4 4) Mouse pad: a) Black compact panel with smoothly movement which suitable for all kinds of mechanical mouse or optical mouse pad b) Flash blue light or seven colors light around the pad c) Dimension: W248mm x D213mm x H18mm d) Allows matching outside power of DC 5V/2,000mA