[. . . ] USB 4 Port Hub F5U021 Q: How do I install the USB hub in Windows or Mac? [. . . ] · Go to Start, Settings, Control Panel, System and click on Device Manager. When you click on it you should have the USB Universal Host Controller and USB Root Hub. · If you don't have these 2 drivers then you need to contact your computer manufacturer. Q: What is the maximum distance between each connected device when connecting the USB hubs. Does it come with one? · It does ship with one, the specs are 7. 5 Volts DC, 2. 1A. Q: How can I tell if the hub is in Self-powered or Bus powered mode?· Look on the side of the hub, there should be a switch that will move left to right. For Bus-powered mode, move the switch to the left. Bus Self For Self-powered mode, move the switch to the right. Q: What is Self-powered mode and Bus powered mode?· In Self-powered mode the ExpressBus is being powered by an external power source of 6 VDC, 2. 1A. This mode is used when connecting another hub, or when connecting power hungry devices like keyboards, scanners and cameras. [. . . ] All trademarks and logos shown herein are the property of their respective owners. [. . . ]