If the headphone volume is not synchronized with your phone or computer, the issue may be related to your device's Bluetooth settings, audio settings, or system behavior. 

Please refer to the following information for common volume synchronization situations and troubleshooting steps.

1. Android Phones: Some Android devices have a Bluetooth volume synchronization or absolute-volume setting. If the headphone and phone volume levels are not synchronized, check the Bluetooth settings for this option. The setting name and location vary by phone model.

2. Computers: Depending on the Bluetooth implementation, the computer and headphone volume controls may behave independently. Adjust the computer volume first, then fine-tune it using the headphone controls.

3. General Tip: Check your device's Bluetooth and audio settings for available volume synchronization options.

If you encounter any other issues or your issue has not been resolved, please contact us for further assistance.