There is no sound or the microphone doesn't work when the headphones are connected to a computer

If you have successfully connected the headphones to a computer with Bluetooth but can't hear sounds or the microphone doesn't work, you need to change the computer settings:

Note: The menu items on the computer screen may vary depending on the model or operating system version.

For Windows 11

1. Open the Start menu and select Settings.
2. Select System.
3. Select Sound.
4. Scroll down to the Advanced menu and select More sound settings.
5. n the Playback tab, select Headphones, and click Set as Default Device.
6. Select OK to close the setting screen.

For Windows 10

1. On the right side of the computer screen, right-click the Speaker icon.
2. Select Open Sound settings, and then select Sound Control Panel.
3. Select the Playback tab to show the device list.
4. Select Headset labeled with Hands-free, and click Set as Default Device.
   Note: If the same headphones model name exists, choose the model labeled with Hand-Free.
5. Select OK to close the setting screen.

For Windows 8.1

1. On the right side of the computer screen, right-click the Speaker icon.
2. Select Playback devices.
3. Select Headset labeled with Hands-free, and click Set as Default Device.
   Note: If the same headphones model name exists, choose the model labeled with Hand-Free.
4. Select OK to close the setting screen.

If the previous settings don't work, follow these steps:

1. Turn the headphones off and then on again.
   Note: Truly Wireless headphones: to turn off the headphones, set them in the charging case, close the lid, then remove them.
2. Restart the computer.
3. Reset the headphones.
4. Initialize the headphones.
   Notes:
   • Initialization returns the headphones to the factory settings, and all Bluetooth pairing information is deleted. After Initialization, delete the pairing information from the computer and perform pairing again.
   • If you have connected to the computer with the headphones named LE-xxxxx (model name), the headphones are paired with the computer with Low Energy mode and may cause the Bluetooth connection to fail or unable to hear the sound from the headphones. To avoid this, pair the headphones named without LE-xxxxx. If only LE-xxxxx is displayed when pairing, wait for a while to show the model name without LE-xxxxx.
5. If you can use a different app or computer, check if the issue is resolved when connected with them.