... supply,no extral AC power required. 2.Scanning target: file,book,magzine,bill,photo,picture,documnet, real object,etc. 3.Scanning ... rate of the OCR function is about 97% for English edition.System Required: 1.Hardware:Pentium 4 CPU, 512 MB RAM ... Bureau,Archives Bureau and so on. 3 million pixels portable book scanner,usb 2.0 interface