Samsung SH-S222AL. CD write speed: 48 x, CD rewrite speed: 24 x, DVD+R write speed: 22 x. CD read speed: 40 x, DVD+R read speed: 16 x, DVD-R Dual Layer read speed: 12 x. DVD drive average random access time: 150 ms, CD-ROM drive average random access time: 130 ms. Disc loading type: Tray, Drive device, buffer size: 1.5 MB, Optical drive type: DVD±R/RW. Burst transfer rate: 1500 MB/s