eTILE only: Pixel resolution: 512 dpi (average x, y over the scan area) Scan capture area: 14.6 mm (nom. width at center) 18.1 mm (nom. length) 8-bit grayscale (256 levels of gray) Reader size (approximate): 65 mm x 36 mm x 15.56 mm Compatible with USB 1.0, 1.1 and 2.0 (Full Speed)