Fujitsu ScanSnap S1500. Maximum scan size: 297 x 420 mm, Scanner type: Sheet-fed, Optical scanning resolution: 600 x 600 DPI. Auto document feeder (ADF) input capacity: 50 sheets. Standard interfaces: USB 2.0. Weight: 3 kg. Power consumption (typical): 35 W, Power consumption (standby): 4.5 W, Input frequency: 50/60 Hz