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On outer ring press in on the upper side of dial for up volume, opposite side of button on outer ring below for down volume. Red blinking is mute, red solid mic is on on center button.
Sorry, there was a problem. Please try again later.Hello, we are sorry to hear that you are having issues with your H390. There could be an issue with your dial/cable. You may reach us for support by opening a Technical Support ticket here: https://support.logi.com/hc/en-us/requests/new?ticket_form_id=360000621393
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