Quick overview from the supplier:
Document Scanner Canon IRIScan Express 4 (3853V992) USB, ADF (10 sheets - 50-80g/m2), 3-colour (RGB) LED, CMOS CIS 2 Line Sensor, Front/ Back/ Duplex, B&W 8ppm/16ipm - colour 8ppm/16ipm, 600x600dpi, 24-bit colour, Daily Duty Cycle: 100 scans/day, USB 2.0, W0.6kg
