Sony DRX-S50U External Portable Slim-Line USB 2.0 DVD Drive DVD-R Dual Layer/DVD+RW, DVD-RAM 4X DVD+R Double Layer (DL), 8X DVD+R, 8X DVD+RW 4X DVD-R Dual Layer, 8X DVD-R, 6X DVD-RW 5X DVD-RAM 24X/24X/24X CD-RW, 8X DVD-ROM Buffer Underrun Protection Technology