That last one was meant for D Gower, This one is for Pioneerx01:- USB is 5volts and max 500milliamps. The specification states that with a computer as host up to 127 USB peripherals with 5 levels of hubs can be connected to a single host controller. (I'd like to see that!). So you should be able to run your printer, scanner, flashdrive, keyboard, mouse & whatever else you come up with via an appropriate size USB (powered) hub. If you need more ports the hubs can be daisy-chained.