Features
* Voice Function
* Over 320,000 words and expressions including:
  235,000 general words
  25,000 medical terms
  30,000 techincal terms
  18,000 legal terms
* 200 popular American idioms
* Over 250 irregular verbs 
* 400 useful phrases
* "Hangman" word game
* Spell-checker
* Calculator

Maximum : 1000 pcs
Minimum :    300 pcs
Shipment : About 3 weeks