ASUS ZenDrive U9M. Product colour: Black, Disc loading type: Tray, Mounting: Horizontal. Purpose: Notebook, Optical drive type: DVD±RW, Interface: USB 2.0. DVD+R write speed: 8x, CD-R write speed: 24x, CD-RW write speed: 24x. CD-R read speed: 24x, CD-RW read speed: 24x, CD-ROM read speed: 24x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 140 ms