First select the languages you want to translate and make sure your device is connected to the internet for better quality translations.
The buttons on each side of the device correspond with the flags displayed on the screen.
The button you press is the language you speak in. The opposite button is the language that your words will be translated into.
After pressing a button, wait for the beeping sound before speaking.
For instance, Travis displays an English flag on the left side (input language) of the screen and a Spanish flag on the right (output language).
Press the left button once to speak in English and translate into Spanish, and vice-versa.
You can also watch this video to see how Travis Touch Plus translates: