IBM 46M0901. 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: 6 x, DVD-R read speed: 6 x. Disc loading type: Tray, Interface: Serial ATA. Weight: 0.227 kg, Height: 14.8 mm, Depth: 100.5 mm. Certification: UL, CSA, TUV, CE Mark, C-Tick Mark, IEC, Taiwan (BSMI Certification), Korea EMI