Calculator Mousepad 1. 10 digits calculator. 2. 4 ports USB Hubs ... Hubs of 2.0.3. Blue backlight.· Multifunctional Computer Mouse Pad combined mouse pad, calculator and USB hub ... Built in 4 USB ports can be connected with other computer accessories, such as keyboard, mouse, USB flash, MP3, ... etc.· Connect PC with this Computer USB Hub, the rim, screen, and calculator buttons will ...