Lite-On eHBU312. DVD-R write speed: 16 x, DVD+R write speed: 16 x, CD-R write speed: 48 x. DVD+R read speed: 16 x, DVD-R read speed: 16 x, CD-R read speed: 48 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 150 ms, BD-ROM average random access time: 380 ms. Interface: USB 3.0. Compatible operating systems: Windows XP/2003/Vista/7