Canon DR-2050SP - Manual (Page 22)

16 Before Using the Scanner
• Scanning speeds are lower if your computer’s standard USB interface is
USB Full-Speed (equal to USB 1.1).
• Use the USB cable provided with the scanner, or a Hi-Speed USB 2.0
compatible cable.
• If the CPU, memory, interface card, and other specifications do not satisfy
the installation requirements, the scanning speed may be greatly reduced and
transmission may take a long time.
• Even if the computer satisfies the recommended specifications, the scanning
speed may vary, depending on the scan settings.
• The ISIS/TWAIN Drivers provided with the scanner do not necessarily
operate on all ISIS- or TWAIN-compatible applications. For details, contact
your application software retailer.