ASUS SDRW-08D2S-U/B. CD write speed: 24 x, CD rewrite speed: 16 x, DVD+R write speed: 8 x. CD read speed: 24 x, DVD+R read speed: 8 x, DVD-R read speed: 8 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 140 ms. Disc loading type: Tray, Drive device, buffer size: 1 MB, Interface: USB. Optical disk diameter: 120 mm