... calculator.Memory Calculation: M=, M-, MRC 2. 3 Port USB Hubs. 3.mood light with Mousepad Calculator Mouse ... pad with 3 Port USB Hub Functions4 USB 1.1 hubs (one in ... according to the polarity sign Set the ON/OFF switch to "ON" position, the unit will display as ... ,USB flash, MP3, MP4 etc. CalculationSet the ON/OFF switch to "ON" position. Press `AC` to start the ...