... calculator with speaker and USB Hub 2) Using as mouse pad, calculator, USB HUB, speakers 3) Black lighting Hot sale gifts Mousepad calculator speaker and USB Hub ... ,fashion and slim* Using as mouse pad, calculator,USB HUB, speakers * 5 USB HUBS (one in ,four out )* Blue ... ultrathin touch screen button* Power Source: 1xAG10(for calculator) / USB (for USB HUB) * Blue mood light* Memory calculation: M+, ...