Flatbed and Colortrac Series 4 [3640, 3680, 4260, 4280, 4860, 5480, FB24120 [XLF, SLF, e]] scanners. ReproWorks requires a programmed hardware lock key or " Dongle " to function. Don't be fooled, this application will run but it will watermark your raster images and prints then completely stop after thirty days