This List includes oneNSM CD 3101 100 Disc Library SystemA German-made CD management system used in commercial jukeboxes worldwide a sleek metal and smoked glass unit. This is the fastest changer you will find. NSM-CD3101 player itself designed to play one CD at the time with disk vibration system tray technology; means if you play music next to the speakers in low frequency, there will be no skipping. NSM-CD3101 player comes with NSM-CD3101AC 100CD Library System that is connected between two with COM1 cable. NSM-CD3101AC has each tray position individually numbered. There are two banks of 50 trays, each bank swings out for easy disc loading. A smoked glass door swings down in front, latches at the top. Unit is industrial grade, heavy gauge steel construction. Outputs are two RCA Analog, one RCA digital (S/PDIF) and one Optical output. Feel free to message me with any questions!