Refreshable Braille Displays
These devices operate by raising and lowering different combinations of pins electronically to produce in braille what appears on a portion of the computer screen. They show up to 80 characters from the screen and are refreshable, that is, they change continuously as the user moves around on the screen. The braille display sits on the user's desk, often underneath the computer keyboard. The advantage of the braille display, in comparison to synthetic speech, is its direct access to information, the ability to check format, spacing and spelling, and the fact that it is quiet. The cost of braille displays is $3,500 to $15,000, depending on the number of characters displayed.
Braille Display Manufacturers