HP Scanjet 5590 Document Scanner Auto two-sided , multiple page scanning Scan media types: Paper (banner, inkjet, photo, plain), envelopes, labels, cards (greeting, index), 3-D objects, 35 mm slides and negatives (using transparent materials adapter),iron-on transfers Features: 50 sheet Automatic document feeder (two-sided), Transparent materials adapter: scans three slides or four 35 mm negative frames Up to 2,400 dpi optical resolution 48-bit color depth, 256 levels of grayscale 5-button front panel for everyday tasks Transparent material adapter Hi-Speed USB interface, PC and Mac compatible