Cd Dvd Library Management Automated Carousel DC300 Automatic CD/DVD Storage/Retrieval System Self-stackable CD Library (DC300) stores 150 CD/unit The included Disc Manager works with PC (2000, XP) or Mac (10.2.4+) USB daisy-chain up to 127 units with max. capacity of 19050 CD/system never lost your favorite CD again, find it in seconds