Writing speeds:CD-R: 10x CLV, 16x CAV, 24x CAVCD-RW: Multi Speed:4x CLVDVD+R: 24x CLV, 4x ZCLV, 8x CAVDVD-R: 2x CLV, 4x ZCLV, 8x CAVDVD+R Double Layer: 24x CLV, 4x ZCLVDVD-R Double Layer: 2x CLV, 4x ZCLVDVD+RW: 24x CLV, 33x ZCLV, 4x ZCLVDVD-RW: 2x CLV, 4x ZCLVReading speeds:CD-ROM: 24x CAVDVD-ROM: 8x CAVDVD-ROM Dual Layer: 6x CAVDVD+R: 8x CAVDVD+R Double Layer: 6x CAVDVD+RW: 6x CAVDVD-R: 8x CAVDVD-R Double Layer: 6x CAVDVD-RW: 6x CAVDVD-Video (CSS title): 4x CAVDimensions :Width :128 cmDepth :127 cmHeight :95 mmColor:SilverMaterial: metalPackage Contents:1 x Inhaled optical driveOnly the above package contents are included, no other products are included.Note: Light and different displays may cause the item color in the picture to be slightly different from the real color. Measurement tolerance is +/- 1-3cm.