Plustek SmartOffice PS406U, 216 x 356 mm, 600 x 600 DPI, ADF scanner, Grey, CCD, 120000 pages per month Plustek SmartOffice PS406U. Maximum scan size: 216 x 356 mm, Optical scanning resolution: 600 x 600 DPI. Scanner type: ADF scanner, Product colour: Grey. Sensor type: CCD, Maximum duty cycle: 120000 pages per month, Scan drivers: TWAIN. Auto document feeder (ADF) input capacity: 100 sheets. Maximum ISO A-series paper size: A4, ISO A-series sizes (A0...A9): A4, Maximum scan area (ADF): 216 x 1270 mm