BRAILLEX EL 40sd the smallest desktop display in the product range. The unit with its 40 interactive cells is just as wide as a regular computer keyboard is - a very attractive display for those who look for a moderately priced unit of the latest generation with all the comfort Papenmeier's slim-line EL displays provide., , Thanks to USB "plug & play" and "hot swap" features, you simply connect the Braille display to your computer, start your favorite screen reader program and go! Alternatively, you can also connect the device to a serial port of your computer.