Sony DRX720UL External USB 2.0/i.Link DVD+R Double Layer/DVD+RW Ultra-fast 16X max Double Layer/Dual Format DVD burner 16X max DVD+R/+RW and Double Layer DVD burning Includes Nero 6.6 Software Suite Works with 4.7GB DVD+R/+RW and 8.5GB Double Layer Discs Compatible with Windows 2000 or Windows XP Home or Professional Operating Systems