Standalone CD Duplicator Tower, NO hard drive. TEACs 1x3 and 1x7 CD-R Duplicators are stand-alone disc-to-disc CD-R Duplication systems requiring no PC Connection. With the numerous menu commands, optional hard disk drive, TEACs Tower Series CD-R duplicators offer the best solution for production level CD-R Duplication requirements today. If fitted with the optional hard disk drive, data can be stored allowing quick retrieval and duplication of your CDs. The systems also Verify, and will Copy/ Compare discs that are duplicated. TEAC line of 1x3 and 1x7 CD-R Duplicators have been specifically designed to meet the growing demand for operators wishing to duplicate small to medium quantities of CDs by the most cost- effective way. The 1x3 and 1x7 Tower systems offer high- performance, high-speed duplication at 52X speeds. There is no need to load extra software or attach any cables to your PC. No extra time is needed to set up the TEAC Tower units, as the towers completely function as stand-alone units.