What is the maximum scan speed of the HP ScanJet Pro 2000 S2?

The HP ScanJet Pro 2000 S2 can scan at up to 35 ppm (pages per minute) in simplex mode or 70 ipm (images per minute) in duplex mode. These speeds are measured at 300 dpi for black-and-white, grayscale, and color scanning. Actual processing speeds may vary depending on scan resolution, network conditions, computer performance, and application software.