Read about business card scanner
Of course there is a drawback to all this portability, and the main one would have to be with regard to image quality. As useful and convenient as these devices are, they simply can't compare with larger models in terms of the clarity of the image. That being said, a portable scanner is still an invaluable aid for most common business applications, and the fact that they are so small and portable makes them the best possible choice for mobile scanning use. If image quality is of more importance to you, you will want to look into a portable scanner that has a high dots per inch or dpi image resolution. Make sure to offers at least 48 bit depth image quality if you're particularly concerned about getting the best images possible.