In this video, the Maono AU-PM421 is tested and compared with the Neewer NW-7000 and the SE Electronics X1.
It seems that it is convenient that this microphone has mute button and gain knob.
"That's got a little bit of different features than the rest of them."
"I can easily mute it on the microphone by just tapping this mute button. That's like one of the cool things."
"The other thing is there is a gain knob on this, so you can just adjust the microphone sensitivity."