How to charge CMF Buds Pro 2?

Charge the earbuds: Put the buds in the charging case and close the case to charge.
Charge the Charing case with earbuds: Put the Buds in the charging case and close the case, connect the case to a power supply through the power cable delivered with the Buds.
If the indicator lamp of the case is flashing white, the case is charging. If it is permanently white, the case is fully charged.