The Mustek A3 1200HS is a high-speed A3 format flatbed scanner, great for engineering drawing and other professional applications. It has the world's fastest scanning speed of 2.3 sec (200dpi, A3-size color), and 1200 dpi optical resolution with true 48-bit color, offering you both efficiency and quality. The flatbed design with an expandable lid makes it easy to scan thick bound books and large documents. Its convenient batch scanning significantly saves you time and hassle when handling multiple scans at a time. Plus, with an array of image enhancing features, you'll get a perfect result every time, even from imperfect material such as fading photos and images with moire pattern or dots.