This CDG duplicator with dual CDR drives from MTU is a stand-alone unit certified to duplicate Karaoke CD+G format discs. This does not require a computer, and does not have a connection for one. You place the CD disc to be duplicated in one drive and a blank CDR disc in the other, and start the duplication process. When done, you have a duplicate copy of the original Karaoke CDG (or other format) disc.