The Slimline CDR is truly portable; no mains power required and is a useful add on to systems which might not already have a CD player. It is also extremely handy when used in conjunction with a CD-RW, connecting the CDR would give you an extra CDROM allowing you to copy CDs straight from disk to disk. Its fast USB2 interface allows quick transfer speeds. The USB 2.0 cable is backward compatible meaning it will also work with USB 1.1 controllers.