Lite-On DH-4O1S Blu-ray reader Sata - BD-ROM (Single Layer) 4x - BD-ROM (Dual Layer) 4x - DVD+R: 12x, DVD-R: 12x - DVD+R DL: 8x, DVD-R DL: 8x - DVD+RW: 8x, DVD-RW: 6x - DVD-ROM Read: 8x - CD-R Write: 32x - CD-RW Write 32x - CD Read: 32X - Buffer Size: 8MB