Full Details from Amazon.com : http://www.amazon.com/gp/product/B00006HZWU?tag=onigi-20

Fujitsu ScanPartner FI-4120C Color Duplex Scanner

Not Compatible with Windows 7
True 600 dpi optical resolution scans up to 25 pages per minute
Dual-CCD array scans both sides of a document simultaneously
50-page automatic document feeder handles think and thin media
Adobe Acrobat 60 ScandAll 21 and QuickScan utilities
SCSI-2 and USB 11 interfaces selectable PC only