HANDHELD Voice Speaking Digital Talking Pocket Electronic Translator Dictionary Computer Organizer English <=> Vietnamese / Talking English function 500,000 words (English + Vietnamese) and expressions Built-in English/Vietnamese conversation, English example phrases and Vietnamese idioms Situation oriented phrases divided into 22 categories Technical words, business terms, legal terms and slang's User dictionary and Revision Test / 200 American idioms Comprehensive Reference information: Travel Guide, Mathematical Formulae, Common English Name, Size Equivalent, Voltage & Frequency and Country Codes / USA Citizen Test /Calculator / Currency conversion / Alarm clock / 256K Full-Organizer functions / Dimension: 5.7x3.3x.7 in. / 5-line display English manual is available One-year manufacture warranty.