BestDuplicator Pro Hd Series - 3 Target External Disc Dvd/cd Duplicator with 500GB Hard Disk Drive,built-in 24X BD Certified Burners Supports DVD+/-R, DVD+/-RW, DVD+/-R Dual Layer, CD-R, CD-RW blank media standards. 500GB Storage Hard Disk Drive installed reading source Standalone DVD/CD SATA duplication: NO software or computer required Burning Time: 3-4 minutes for CD, 6-8 minutes for DVD Warranty: 3 year labor & 1 year parts, free life-time technical support