Why this model?
As a bonus, it possesses a USB hub!
This hub has 4 USB port.
You can use 2 port without electrically connecting the hub but if you used the 4 USB ports must connect the hub. (The power cable is supplied !!)
Personally I have not connected to the current because I only use 2 ports.
This item is perfect for the USB ports on the desktop without having to look behind the tower and cable mouse lying around!