The new machine is able to duplicate up to 21 CDs or DVDs at a time and is able to copy CDs at 48x (48x the amount of time required to play the CD) and DVDs at 16x (16x the amount of time required to play the CD). It also features a built in auto disc counter, allowing the user to keep track of the number of discs burned as part of any given project. While no PC connection is required, an optional USB PC or Mac connector can be supplied for communication with a computer or other device. The SD21 can also feature an 80, 160 or 200 GB hard drive if required, allowing the user to create a library of information before mass CD duplication. www.cd-writer.com
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