www.amazon.com/gp/product/B0875ZFB8G/ - Page says push both volume + and - to mute. The manual had no mention of this and said to flip up the mic. Both methods do absolutely nothing. Mic still hot.

www.amazon.com/gp/product/B081Q5RCMV - mute button in on the mic arm on this one. Pressing, again, does absolutely nothing. Mic still hot.

The other 2 I bought at a physical store and have long since returned them. In all cases the mute function does nothing at all.