This BestDuplicator is a professional SATA DVD/CD Duplicator that offers optical disc burning technology. It's Compatible for any purpose that allows disc duplication(excludes copying protected discs/movies). The user friendly LCD interface provides a simple one step copy function that burns your DVD blank discs at an optimal speed producing 1 15 (depends on your # of Targets on your duplicator) copies every burn cycle. Burning speeds are adjustable and other standard menu features are available as more advanced features. A computer or external device is not required at all to use the unit. Inside this copy tower, different CD and DVD formats are automatically detected to allow stable and secure buffer speeds while under run protected burning without the added trouble or stress from a computer to handle such functions. Whats new. Compared to the older model at 20X this one comes in built in with 24X drives (BestDuplicator Certified), giving you much faster burn speeds and write speeds. With the all new BestDuplicator 128MB Controller, it has became a nobrainer to buy our brand.