The HP Scanjet 5590 is a flatbed scanner with an automatic document feeder (ADF) that offers high-speed, two-sided scanning capabilities. Key features include a 2400 dpi optical resolution, 48-bit color depth, and the ability to scan documents up to 8.5 x 14 inches. It also includes a transparency adapter for scanning slides and negatives. Key Specification: Type: Flatbed with ADF (Automatic Document Feeder) Resolution: Up to 2400 dpi optical resolution. Color Depth: 48-bit. Scan Size (Flatbed): Up to 210 x 297 mm (8.5 x 11.7 inches). Scan Size (ADF): Up to 210 x 356 mm (8.5 x 14 inches). ADF Capacity: 50 sheets. Scan Speed (ADF): Up to 8 ppm (pages per minute) or 4 ipm (images per minute) for two-sided scanning. Scan Speed (Flatbed): According to B&H Photo, it takes less than 24 seconds to scan a 4x6-inch color photo into Microsoft Word. Scan File Formats: BMP, JPEG, TIFF, TIFF compressed, PNG, PCX, Flashpix (FPX), PDF, PDF searchable, RTF, HTM, TXT (Windows) and TIFF, PICT, JPEG, GIF, FlashPix, Plain Text, PDF, HTML, Rich Text (Macintosh). Transparency Adapter: Included for scanning slides and negatives. Automatic Document Feeder: Handles multi-page, two-sided documents. Connectivity: Hi-Speed USB 2.0. Software: Includes NewSoft Presto! PageManager for document management and ISIS compliance. Operating Systems: Compatible with Windows 10, 8, 7, Vista, XP, 2000, and Mac OS X v10.6, Lion, and Mountain Lion.