How to remove vibration from WI-C400 wireless headphones in Do Not Disturb mode?

Question

Android

Problem: WI-C400 headphones vibrate when calling even when Do Not Disturb is enabled on my OnePlus phone. How to disable vibration?
PS If you turn off "Calls" in the device settings, then the battery charge indicator in the smartphone curtain does not work. What can be done?

Answer 1

Suddenly someone will have the same problem. Here is what they answered. support. Hope this helps someone! :)
To turn off the function, press and hold the [PLAY] button and the [ - ] button for about 2 seconds when the headset is turned on. You will hear a voice prompt informing you that the function has been switched, and the left earpiece of the headset will vibrate twice.
To turn the function back on, press and hold the [PLAY] button and the [ + ] button for about 2 seconds while the headset is on. You will hear a voice prompt informing you that the function has been switched, and the headset earpiece will vibrate for approximately 1 second.