Samsung SE-S224Q. CD write speed: 48 x, CD rewrite speed: 4 x, DVD+R write speed: 22 x. CD read speed: 48 x, DVD+R read speed: 16 x, DVD-R read speed: 16 x. DVD drive average random access time: 130 ms, CD-ROM drive average random access time: 110 ms. Drive device, buffer size: 2 MB, Optical drive type: DVD±R/RW, Interface: USB. Dimensions (WxDxH): 163 x 232 x 50 mm