... design, multifunctional ,fashion and slim* Using as mouse pad, calculator,USB HUB, speakers * 5 USB HUBS (one in ,four out )* Blue ... Source: 1xAG10(for calculator) / USB (for USB HUB) * Blue mood light* Memory calculation: M+,M-,MRC* Mouse Pad: Plastic housing material* 5 ... USB HUBS (one in ,four out )Version ...