SharkBlu Daisy Chain Blu-ray / DVD / CD Duplicator The SharkBlu DC (daisy chain capable duplicator) offers all the incredible capabilities and quality of the standard SharkBlu series with the added capability to connect multiple towers together that are all operated by a single source. Even though each tower can be operated independently, when they are connected together in a daisy chain configuration using a special serial cable, the SharkBlu DC can link over 60,000 towers together operated by a single source on the master tower. All units whether used on their own or connected are completely standalone and provide exact digital copies of CD, DVD and Blu-ray discs.