Hello, you can follow the following steps to turn off Huawei flat-panel wired headphones:
1. Turn on your Huawei tablet and ensure that the wired headset is connected and working properly.
2. Open the Settings application.
3. Click \"Sound and Vibration\".
4. Scroll through the screen and find the \"Wired Headphones\" option.
5. Click the \"Wired Headphones\" option and switch to the \"Off\" state.
6. Confirm your selection and close the Settings app.
At this point, the wired headset of your Huawei tablet should be turned off.