CASIO Ex-word XD-M500 (compact size)

Screen size: 4.1 inches / Displayable characters: 26x17 / Backlight: Not supported / Key layout: QWERTY Dictionaries: Japanese, Chinese, English-Japanese, Japanese-English, English-English / Other dictionaries: Study, Travel / Number of dictionaries included: 26 / Audio pronunciation: Not supported Built-in memory capacity: 0MB / Text reading: Not supported Power supply: AAA batteries / Maximum continuous use: 80 hours