... design, multifunctional ,fashion and slim* Using as mouse pad, calculator,USB HUB, speakers * 5 USB HUBS (one in ,four ... in office ,school and home, etc.* Multifunctional mouse pad calculator with mini speaker* 12-Digital arithmetic, ultrathin touch screen button ... * Power Source: 1xAG10(for calculator) / USB (for USB HUB) * Blue mood light* Memory ...