The Sawyer’s Grand Prix 570 AF is a projector for 35mm slides. It accepts optional Sawyer’s Rototray, Sawyer’s and Universal straight trays, and Sawyer’s stack loader accessories. One Universal tray is included. It’s unclear why they called this projector a “Grand Prix” except that it’s made out of the same colour and texture of plastic as a 1960s Pontiac interior, so maybe that's all it takes? Works well, though.