EPSON Perfection1640 are ideal for knowledgeable home and small/medium business users who demand high quality with rapid speed and maximum efficiency. Featuring a 1600dpi alternate MatrixCCD™ with EPSON Micro Step drive for a sub scanning resolution of 3200dpi, the Perfection 1640SU series can capture maximum image detail. The internal and external 42 bit colour depth enables the capture of a staggering 440 billion colours and 16,384 shades of grey ensuring even the most subtle colour changes are recognised.