The charging method of wireless Bluetooth headphones will vary depending on the brand and model, in general, you need to use the charging cable that comes with the headset to connect to the power supply for charging.
First, connect the headset to the charging cable, and there will usually be an indicator light indicating that it is charging. After charging is complete, the indicator light will be extinguished or changed to a different color. Make sure the headset is fully charged before use. It is recommended to follow the instructions in the product manual for correct operation. In particular, do not use charging devices that do not meet the specifications or use the wrong plug\/accessory.
Wireless Bluetooth headsets usually have a built-in battery that needs to be charged via a charging case or cable. A charging case is a small box, usually also wireless, that can provide multiple charges for the headset. Put the headphones into the charging case, make sure the socket is plugged in correctly, and then connect the case to a power source or charge it via wireless charging.
If charging is through a charging cable, you need to plug the charging cable into the charging port on the headset, and then plug the other end into the power supply to start charging.