Plextor PX-B950UE. BD-R write speed: 12 x, DVD+R write speed: 16 x, DVD-R write speed: 16 x. DVD+R read speed: 16 x, DVD-R read speed: 16 x, DVD-R Dual Layer read speed: 8 x. DVD drive average random access time: 150 ms, CD-ROM drive average random access time: 150 ms, BD-ROM average random access time: 380 ms. Drive device, buffer size: 8 MB, Interface: USB 3.0 & eSATA, Mounting: Horizontal. Width: 163 mm, Depth: 224.7 mm, Height: 51.5 mm