Lite-On eSEU206. DVD-R write speed: 8 x, DVD+R write speed: 8 x, DVD-RW write speed: 6 x. CD-R read speed: 24 x, CD-RW read speed: 24 x, BD-ROM read speed: 6 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 160 ms, BD-ROM average random access time: 300 ms. Interface: USB 2.0. Compatible operating systems: Windows 7 Windows Vista (32/64-bit) Windows XP SP2