Scenario: When taking a voice or video call on my PC using my headset that is paired via Bluetooth, the other party cannot hear me and I cannot hear them. What should I do?
In the voice or video call app, ensure to select the correct audio setting for taking calls by selecting the “Hands-Free AG Audio” profile. See examples below:
Note: The image samples below were taken from Microsoft Teams.
Razer Hammerhead TWS Pro

Razer Kraken BT Kitty Edition
Razer Opus
If the issue persists, see How to troubleshoot and resolve a headset or headphone with no sound, poor audio, or uneven audio balance.
You can also follow the instructions in The sound quality on my headset is worse when it’s paired to my PC compared to my smartphone or mobile device article.