Sony Vaio DVD+R DL/DVD+RW External Optical Drive (VGP-DDRW4) DVD+R double layer technology/ DVD+/-RW drive Store up to 4 hours of DVD video or up to 8.5GB of data on one dual layer disc Compatible with UX Series Micro PC FireWire interface 8x DVD+RW/ 6x DVD-RW/ 5x DVD-RAM rewrite speeds