Shure Beta 87A ULX Series Transmitter
Amazing sounding mic and pretty reliable as far as dropouts and reliable frequency stuff is concerned. I have had 2 units in need of repair for some shorting issues, but that was after some pretty rigorous use. If it weren't for that issue, I would have given this a 5 star rating. If pure reliability is your concern, then look at Sennheiser. Sound wise though, this is the ticket, although some voices don't sound as well as others on the 87A capsule.