This is a very handy device to make connections easier. It can be attached to a computer, Hi-Fi system, or anything else you can think of. It has no electronics inside, providing full throughput with no power requirements. A 2m cable connects the USB and 3.5mm plugs to the sockets, which are mounted into a single enclosure with a bracket included. This provides you with flush-mount and surface-mount options, while a dust-cap is included to help keep dust out while not in use.