... Mouse pad calculator with speaker and USB Hub 2) Using as mouse pad, calculator, USB HUB, speakers 3) Black lighting Hot ... ,fashion and slim* Using as mouse pad, calculator,USB HUB, speakers * 5 USB HUBS (one in ,four out )* Blue backlightingMain ... with mini speaker* 12-Digital arithmetic, ultrathin touch screen button* Power Source: 1xAG10(for calculator) / USB (for USB HUB) * Blue mood ...