There are three buttons. The power button does what you’d expect. You hold the big one on the front to have ili listen and automatically translate. Tapping it again will repeat the phrase it just spoke. The third button repeats back what it thinks you said, in ili’s voice. If you hold down that last button it switches between the ili's 3 languages: Spanish, Japanese, and Mandarin.
Join the tens of thousands of people making the wealth of information on the internet accessible to everyone. There are many opportunities to volunteer. Organizations, like TED Talks, Scientific American, Net in Nederlands, and Udacity are just a few. Others, such as the Captions Requested team ensure videos are accessible to the Deaf and Hard of Hearing. https://mashable.com/video/wt2-plus-wearable-translator-timekettle/
The Wikipedia translator -- very useful for technical translations. Harnesses the vast amount of cross-lingual information on Wikipedia and Wiktionary, and present it in a neat, time-saving way. Simple user interface. Built for translators, by a translator, but is a generic tool for anyone who wonders what a word or phrase means, which language it is and what it is in other languages. All Wikipedia languages (currently 292).