product description : canon document scanner type : colour flatbed scanner scanning element : cis (contact image sensor) light source : rgb three-colour led resolution : 1200 x 2400 dpi optical 19,200 interpolated scanning gradation : colour : 48-bit input/24-bit output grayscale : 16-bit input/8-bit output maximum size : a4/ltr, 216 x 297 mm preview speed : approx. 24 sec (calibration processing time not incl) scanning speed : colour: 8.7msec/line (1200dpi), 16.9 msec/line (2400dpi) grayscale, b&w : 2.9 msec/line (1200dpi), 5.6 msec/line (2400dpi) interface : high speed usb 2.0 power supply : via usb power consumption : 2.5w (max), 1.4w (standby) dimension(h x w x l) : 40 x 250 x 370 mm weight : approx. 1.6kg