I recommend APACER PH150:
http://emea.apacer.com/en/images/product/454.jpg

I have two of them and works with now problem with low price. It's 4-port device.
Innovative rotating USB port design, Plug-and-play, High-speed data transfer USB2, Over-current detection and protection
more info here:
http://emea.apacer.com/en/products/PH150.htm