The adjustable back allows me to use less space, while still reading all fine. It has a clip at the top that holds the documents in place. two paper holders at the bottom to keep the wind from blowing your pages around. There is a clear place guide with a blue line on it to keep your place and would be helpful if you loose your place while transcribing or reading. The bottom is not only a much larger base, but has prongs to keep all the papers in place AND a rough area in the center to help keep them from sliding as well. size:23*11cm Material:Metal + ABS colour:black Package Contents: 1 * Desktop Document Book Holde Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.