Wholesale USB Hubs: Just as you would add a power bar for additional outlets, USB hubs let you to do same except to add more USB ports for peripheral connections. They often come in 2 varieties: 4-port and 7-port USB hubs. Other more advanced USB hubs combine with serial, parallel, Ethernet and maybe USB audio / video output to form a brand-independent laptop docking station. Installing a USB hub is simply a job of connecting the hub itself, AC adapter and USB cable, but if you already have a mix of Hi-Speed USB and classic USB devices, getting them to coexist could be a challenge.