This set of translation earbuds came with storage case doubled as charger and a short USB charging C to A charging cable.Setup and use of the earbuds require the app AICool. Registration with a valid email address is also required. Additional services like offline translation requires additional pay subscription.The translation page requires selection of source and target languages. While there is no auto detection option, I found in actual use, it can properly translate mix source language with English in the conversation to the target language. In addition to translate with sound through earbuds, it can also show the translation on the screen which is very useful for interaction.In terms of accuracy, it is reasonably accurate when speak a little slow and clearly with common daily words. The accuracy drops when the speaking rate increases or using lesser common phrases. When using it to translate TV or steaming program with long and fast speaking narratives, not only the accuracy drops, it has problem of catching up and dropping words even large part of sentence.Overall, pretty good realtime translator for none critical use like traveling abord to interact with foreign language speakers, that a few inaccurate translation here and there does not matter much.