... USB HUB, speakers 3) Black lighting Promotion Gift Mouse calculator with writing pad Model No.BJL-CE- ... New smart design, multifunctional ,fashion and slim* Using as mouse pad, calculator,USB HUB, speakers * 5 USB HUBS ... using in office ,school and home, etc.* Multifunctional mouse pad calculator with mini speaker* 12-Digital arithmetic, ... / G.W.: 8.5 KG Promotion Gift Mouse calculator with writing pad