The usb3ext6inbk usb 30 extension cable extends the reach of a usb 30 port on your laptop or desktop computer by 6 inches and gives you more room for connecting multiple devices the cable can also help to prevent damage to the usb 30 port on your computer in testing environments or other situations where the port is accessed repeatedly the extension allows you to connect multiple devices at once such as flash drives and gives you open access to ports even when they are located closely together t