Electronic braille notetakers are small, portable and battery operated devices with braille keyboard for entering information. They use a speech synthesizer or braille display for output. The Braille notetaker can be used by blind or visually impaired people who read braille.
Source: GATE (http://abilitynet.wikifoundry.com/page/Braille+Notetakers)
A braille notetaker is a portable computer or personal data assistant that has a Braille display built onto it. These devices can be used in a stand-alone mode for taking notes, doing basic word-processing, scheduling appointments and performing other tasks. They can also be connected to a computer with screen reading software and act as a Braille terminal.
Source: Vision technologies: access to literacy, Special Education Technology, British Columbia (SET-BC), 2003 (http://tecnoaccesible.net/en/node/4016)