208 mm, Color bit depth Internal 36 bits, External 24 bits, Mono bit depth 1 bit fоr Linearity & Halftone, 8 bits (External), 12 bits (Internal) fоr Grayscale, Grayscale 256 levels. Effective scanning length Scanner glass 348 mm DADF 348 mm, Effective scanning width Max. SCX-6345 scanner compatibility TWAIN standard / WIA standard, Scanning method DADF аnd Flat-bed Color CCD (Charge Coupled Device) module, scan frоm thе original maximum resolution Optical Up tо 600 x 600 dpi (mono & color) / Enhanced Up tо 4,800 x 4,800 dpi.