It's a handheld strobe tuner. It would seem to be a small elegant way to solve a couple of real pain in the butt problems. Clip on tuners are great - particularly the lighted ones as they can be used in dark venues and etc... but the good ones are $90+ and I've lost three of them now. But more than that - sometimes you really have to pluck a note hard to get them to do an accurate job... which isn't exactly good stage etiquette - and I've found that sometimes background noise or hum will excite the soundboard enough to further interfere with tuning using a contact tuner - particularly if the guy next to you is also tuning up... which is pretty much always the case at jams and gigs. This would seem to do away with those problems if it is indeed as easy to use and high quality as they say. My guess is that you'd have to pluck and observe at the 12th fret in order to keep harmonics from messing with it. This is basically the same technology that turntables have had built into them for years. But if they're decent - a guy could get a handful of them and put one in every guitar case he has and a few scattered around on coffee tables at home and be done with it... never have to hunt around for a tuner again... You'd probably have to write your name on them with a marker as I imagine these would disappear faster than Wegens
So - has anyone tried one?
You get one chance to enjoy this day, but if you're doing it right, that's enough.