Optelec ALVA Satellite 584 Pro Braille computer display Each ALVA Satellite Braille display combines enhanced ergonomic design with powerful functionality. Features including twin satellite key pads, double touch cursors, status cells, and speech feedback activation are designed to provide simple and alternative ways in which to work more productively. The spacious front panel thumb keys allow the user to control the Braille line across the computer screen. The ALVA Satellite series of terminals provide those that can read and write in Braille with access to the world of communication and information. Simply connect an ALVA Satellite Braille display to a PC or Apple MAC with screen reading software installed, and the Braillist has quick and easy access to mainstream applications such as word processing and spreadsheet programs.