Allows connection of the duplex, sheetfed scanner with ADF to either the Perfection V19 or V39 flatbed, photo scanners. This allows the best of both worlds. A Photo/Flatbed scanning option with a fast, duplex sheetfed scanner. Scan stacks of documents as fast as 35ppm/70impm with the DS-530 sheetfed scanners. Scan photos, fragile or bound material with the flatbed photo scanner either the Perfection V19 or V39 Save space by combining both.