The Braille Keyboard for the Blind and Visually Impaired is a braille keyboard designed for use by individuals who are blind or have low vision. This 104-key keyboard is equipped with clear braille labels that allow the original key legends to show through enabling both blind and sighted users access to the keyboard. This keyboard is ready to plug into a computer, and can be used to convert an existing computer for use by individuals who are blind or have low vision. It can also help those losing their vision to learn braille over time. The product is available in two different version: one has PS2 connector and the other has USB connector. COMPATIBILITY: For use with IBM and compatible computers. WEIGHT: 3.5 pounds.