This small hub and refined appearance will save you 7 USB port on your computer. It also works well for charge USB devices (MP3 player, cell phone), transfer data (HDD self powered or not, usb) to plug the USB receiver and bluetooth, etc. I always used with diet so I can not tell you the number of devices it can power without power. By cons, with the power I plugged simultaneously, three self-powered hard drives, two hard drives offices, a Logitech USB Bluetooth receiver and a receiver. Attention to the spacing between the ports because I have fairly wide USB key and sometimes I could not put 2 side by side. Blame especially USB manufacturer who make too wide devices. The cables provide are good bills and of good length and for connecting to a tower behind a desk without any problems. I have used a daily basis for over 4 years and has finished The power supply let go me (well not really but when I plug it emits a hissing sound scary and so I prefer not to use it). I was so happy with this product I did not hesitate and I bought exactly the same.
