Bestduplicator BD-SMG-3T 3 Target 24x SATA DVD Duplicator with Built-In M-Disc Support Burner (1 to 3) Supports DVD+/-R, DVD+/-RW, DVD+/-R Dual Layer, CD-R, CD-RW blank media standards.1 slot is meant for the original CD/DVD and the 3 remaining slots are for the blank CD's/DVD's being burned, which makes this unit a "3 target" User friendly controller utilizes familiar ESC and ENT keys with tactile feedback for easy navigation Intelligent design automatically recognizes the source disc format New 24X Burners, 128MB Controller, Fully stand-alone system - No computer needed Comes with a 1 year warranty (parts and labor included) and free life-time toll-free 1800 technical support