Yamaha CD Recordable/Rewritable Drive CRW-F1UX - Manual (Page 12)

Features of the CRW-F1UX Drive
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CD-MRW (CD Mount Rainier ReWriting)
CD-MRW is a new standard of packet writing. Compared to the ordinary packet
writing, CD-MRW provides many useful functions such as background formatting.
(P. 37)
USB interface (USB 2.0)
The CRW-F1UX drive uses USB 2.0 that provides high-speed data transfer
capability (max. 480 Mbps). The transfer speed is about 40 times faster than the
USB 1.1.
In addition, the CRW-F1UX drive supports the hot plug function that enables you to
connect/disconnect the drive while computer is turned on.