Audio DJI
DJI Mic Mini
Tiny clip on wireless mic that just works. Clear audio without a cable or a setup ritual.
Bad audio loses viewers faster than bad video, and the Mic Mini is the easiest fix on this page. It is small enough to forget you are wearing it, the battery lasts through a real shoot day, and pairing is close to automatic.
If you are filming on a phone or a camera with a weak built in mic, this is the single upgrade that makes everything sound more finished. It will not replace a treated room and a proper interface for studio work, but for run and gun it is hard to beat.