Plextor PX-B310U. 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: 6 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 150 ms, BD-ROM average random access time: 350 ms. Interface: USB 2.0. Compatible operating systems: Microsoft Windows 7, Vista (32 / 64 bit OS), XP SP2, Bundled software: Cyberlink BD Suite TTHD