Up to 200 dpi Color Duplex 240 in. ( 6096 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU

Fujitsu Fi 7300NX Wireless Document Duplex Scanner with Touchscreen Gray/White PA03768-B005 - Best Buy

Duplexer 1.6-150 & 400-470MHz, with cable

Duplexers – Pacific Research

Up to 200 dpi Color Duplex 236 in. ( 6000 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU

Up to 200 dpi Color Duplex 236 in. ( 6000 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU

Up to 200 dpi Color Duplex 236 in. ( 6000 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU

sane-backends/backend/avision.c at master · marschap/sane-backends · GitHub

Up to 300 dpi Color Duplex 118 inch ( 3000 mm ) – Avision EU

Up to 200 dpi Color Duplex 240 in. ( 6096 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU

Marine Grade Duplex Cable

Up to 200 dpi Color Duplex 236 in. ( 6000 mm )；Up to 300 dpi Color Duplex 218 in. ( 5540 mm )；Up to 600 dpi Color Duplex 59 in. ( 1500 mm ) – Avision EU