There are a lot of times when a hardwired audio connection just isn’t going to cut it in a run and gun situation. And the first place most of us turn is to a good wireless mic setup. I’ve got an older version of this one from Sony, and it is rugged, reliable, with great sound.
The problem with the pro wireless units is that they are fairly bulky (you wouldn’t be carrying it around full time in a camera bag, unless you are seriously doing only interviews) and at $600, rather expensive.
TSA inspectors don’t like them because they look like part of a detonation system. Overseas, customs inspectors don’t like them because they look like something you could start a revolution with. They’re strictly for bigger, professional productions.
Wouldn’t be nice if there were a reasonably priced ($179), tiny, lightweight (2 oz.) wireless system you could throw in your bag on fulltime basis to use for those travel gigs where you will occasionally find a character you’d love to mic up for a quick interview?