Addonics ZBWESU3. DVD-R write speed: 16 x, DVD+R write speed: 16 x, DVD-RW write speed: 6 x. DVD+R read speed: 16 x, DVD-R read speed: 16 x, DVD-RW read speed: 12 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 150 ms, BD-ROM average random access time: 180 ms. DVD-ROM transfer rate (sustained mode): 22.16 MB/s, BD-ROM transfer rate (sustained mode): 288 MB/s, CD transfer rate (sustained mode): 7200 KB/s. Interface: USB 3.0 & eSATA