The optional flatbed scanner dock combines your document scanner with a flatbed scanner into a single unit (DS-530 II/DS-770 II). This allows you to scan thick or over-sized originals, such as cardboard and books, that won't fit into the document scanner's ADF.
You must purchase a flatbed scanner (Epson Perfection V19/V39) to use the optional flatbed scanner dock. To attach the flatbed scanner and dock to your document scanner, follow the installation instructions that came with your flatbed scanner dock.