IBM UltraSlim Enhanced SATA DVD-ROM. Disc loading type: Tray, Certification: UL, CSA, TUV, CE Mark, C-Tick Mark, IEC, Taiwan (BSMI Certification), Korea EMI. Interface: Serial ATA. CD write speed: 24x, DVD+R write speed: 8x, CD rewrite speed: 24x. CD read speed: 24x, CD-R read speed: 24x, CD-RW read speed: 24x. Width: 128 mm, Depth: 129 mm, Height: 12.7 mm