This is a sophisticated technology where images are projected from a camera to a screen, where the image can then be modified in size and clarity to aid those with low vision. There are a wide variety of CCTV devices on the market, ranging from small hand-held versions to large fixed-stand devices. More sophisticated devices may feature large screens, tools for stabilizing or grasping objects, and other modification options. A standard feature of all video magnifiers is their ability to read white letters on a black background or black letters on a white background.