Scanner type Flatbed Sensor type CIS Light source 3-color (RGB) LED Optical resolution * 2400 x 4800 dpi * Optical resolution represents the maximum sampling rate based on ISO 14473. Selectable resolution 25-19200 dpi (ScanGear) Scanning bit depth Color: 48 bit (16 bit input for each color (RGB))/48 bit or 24 bit output (16 bit or 8 bit output for each color (RGB)) Grayscale: 16 bit input/8 bit output Interface Hi-Speed USB * * The fastest speed in Hi-Speed USB mode on Windows PC. Transfer time is not included. Scanning speed varies according to the item types, scan settings, or specifications of the computer. Maximum document size A4/Letter (8.5" x 11.7"/216 x 297 mm) Scanner buttons 4 buttons (PDF, AUTO SCAN, COPY, SEND) Operating environment Temperature: 41 to 95 �F (5 to 35 �C) Humidity:10 - 90 % RH (no condensation) Power supply Supplied via USB port (No external adapter required) Power consumption In operation: 2.5 W Stand-by: 1.5 W *1 Off: 11 mW *1 *1 USB connection to PC.