As he points out, there are no batteries or on-switch for this mic. If it’s plugged in, you are recording audio. This is a simple and basic mic in a much smaller package than what we saw with the RØDE VideoMic GO from a couple years ago.
For a $59 mic, it sounds great. If you record video at all with your camera, you officially have no excuse for crappy audio in your videos. You can find the RØDE VideoMicro here at B&H Photo.