Whether the earbuds can be used or not is due to different scenarios.
The explanations in different scenarios are as follows:
1. When the charging case is charged alone, the earbuds can be used;
2. When the charging case and earbuds are charged at the same time, the earbuds need to be placed in the charging case during charging. So the earbuds cannot be taken out and used;
3. When the charging case charges the earbuds, the earbuds need to be placed in the charging case during charging. So they cannot be taken out and used.
Note:
If the charging case only charges one earbud, the other earbud can be used alone.