Personal assistive device
1. Assistive technology belonging to voters rather than any supplied with the voting system.
Source: Election Terminology Glossary - Draft, National Institute of Standards and Technology (NIST), https://pages.nist.gov/ElectionGlossary/
2. A device that is carried or worn by an individual with some physical impairment whose primary purpose is to help compensate for that impairment.
Source: Glossary of terms database, U.S. Election Assistance Commission, https://www.eac.gov/glossary/