One of the things that bothers me the most about the iMac is its access to the USB ports on the back. A HUB is usually the solution but many of them require an additional power adapter or are truly bulky, although thanks to the iHub 2, these problems are solved.
iHub 2 offers a neat aesthetic and presents the backlit Apple logo on the top, does not need any additional current transformer and allows us to connect up to four USB 2.0 devices.
iHub 2 costs $ 9,90 and can be purchased from the MIC Gadget website.
Source: Mac Stories