Replace all those books on your reference shelf with this one handy electronic device! For the beginners or advanced writers and readers, this electronic dictionary-thesaurus contains over 300,000 definitions, 500,000 synonyms and antonyms, geographical & biographical dictionaries, a guide to punctuation, style & grammar and a five language translater. Portable for schoolwork on the road, and useful for all language arts subjects, you'll even get some games, learning exercises and SAT word lists! Perfect for every student. This electronic comprehensive reference set takes two 2032 Lithium batteries (included).