# Braille Displays

Support for braille displays is determined by the underlying support found in `brltty`. Most displays work under `brltty`, connected via either a serial port, USB or bluetooth. Details on supported braille devices can be found on the `brltty` website. &debian-gnu; &release; ships with `brltty` version &brlttyver;.

## Hardware Speech Synthesis

Support for hardware speech synthesis devices is determined by the underlying support found in `speakup`. `speakup` only supports integrated boards and external devices connected to a serial port (no USB, serial-to-USB or PCI adapters are supported). Details on supported hardware speech synthesis devices can be found on the `speakup` website. &debian-gnu; &release; ships with `speakup` version &speakupver;.