PC speaker not muted after plug in.

I plugged in no problem. Mike seems low. When I purchased the reviews on Amazon said it would mute my PC speakers. It hasn’t is there a setting I need to use?

May I please know which product you are referring to? I cannot speak for the reviewers but you usually have to (assuming you are using Windows) control panel > sound > playback tab and set the device to be your default device and default communication device.