LG BP40NS20. DVD-R write speed: 8 x, DVD+R write speed: 8 x, DVD-RW write speed: 6 x. DVD+R read speed: 8 x, DVD-R read speed: 8 x, DVD-RW read speed: 8 x. DVD drive average random access time: 270 ms, CD-ROM drive average random access time: 260 ms, BD-ROM average random access time: 260 ms. DVD-ROM transfer rate (sustained mode): 11.08 MB/s, BD-ROM transfer rate (sustained mode): 143.86 MB/s, CD transfer rate (sustained mode): 3600 KB/s. Interface: USB 2.0