*Full function mousepad usb hubs *12 digital calculator *Mini speaker,FM radio optional *4 port usb hubs *OEM ... gift mousepad usb hubs with speaker, calculator Function:5 USB HUBS (one in, four out)12-digital arithmeticMemory Calculation:M+,M-,MRCMouse padBlue ... " position, press 'C/CE' to start the calculator, pressing the function key to fulfill the 12-digital arithmetic; Press 'M+', 'M' & 'MRC' to ...