The xerox duplex travel scanner scans without the need of ac power because it is powered through the usb port now you can quickly scan file and store all of your documents plastic id cards photos articles and brochures no matter where you are weighing a little more than a small bottle of water the xerox duplex travel scanner includes robust pc and mac twain drivers and scans cards as small as 15 38 mm and documents up to 85 216 mm wide and 32 813 mm long main features