@angelot1970 Have you connected PowerConf to Soundcore app and updated the firmware? also if you use it for meeting only for yourself, change it to “Single-Person mode”
Are you using Zoom with PC or Smartphone?
For PC – On Zoom Audio Setting, make sure to have the Volume to maximum and remove / uncheck the “Automatically adjust volume” option.
For Smartphone (iOS) - there are no settings to adjust the microphone volume for Device connected via BT, that is, for Anker PowerConf.
Do let us know how it goes with these settings.