I am very impressed!. It takes a little playing around with in order to understand how to use them, because there are a few different options for using.

First of all, you need to download the app in order to use the earbuds.
If you are trying to talk with another person, each person puts an earbud in. You set the two languages you are trying to communicate in.

There is an option to tap the earbud and start speaking, and then the app translates for the other person into their language.

There is another option that you wear the earbud and touch it to speak, the translated voice will play from the phone speaker, you should tap the screen for the other peoson to speak, then you can hear the translated language from the earbud. That version a person has to be actively using the app.

The last option is the one i use most, and it would me the easiest option...two persons wear earbud each, just tap "start conversation" on the app to freely talk. You both don't have to touch the earbud, it's very convenient. Sometimes the translation can be inflenced by other people's voice around, but not a big deal.

Overall, these are very impressive if you have some translation purposes.