The ProDuplicator 7DVDS20X is a DVD±RW dual-layer burner from the external enclosure type. Its interface is USB 2.0 and storage type DVD Duplicator. It supports the following speeds: Read Speed: 16x (DVD); ReWrite Speed: 32x (CD-RW), 8x (DVD+RW), 6x (DVD-RW), 12x (DVD-RAM); Write Speed: 48x (CD), 8x (DVD+R DL), 8x (DVD-R DL), 20x (DVD+R), 20x (DVD-R).