Full Details on Amazon.com : http://www.amazon.com/gp/product/B00004Z3IY?tag=tsukuyomi-20

Epson Expression 1640XL Special Edition Scanner

Large-format color flatbed scanner for professional users
True 1600 dpi optical resolution
42-bit color and 36 Dmax optical density
122-by-172-inch scanning area
USB and SCSI connectivity optional FireWire