Memorex 20x DVDRW DL USB 2.0 External Drive (Discontinued by Manufacturer) Form Factor: External, Maximum CD Read Speed: 48x, Maximum CD Rewrite Speed: 24x, Maximum CD Write Speed: 48x, Maximum DVD Read Speed: 16x, Maximum DVD Rewrite Speed: 8x, Maximum DVD Write Speed: 20x, Maximum Read Speed: 16x DVD/48x CD, Maximum Rewrite Speed: 8x DVD/24x CD, Maximum Write Speed: 20x DVD/48x CD, Media Support: Double-layer - DVD-RAM/R/RW Sold as 1 each