the intercoms have been working very well, I have used them in real life situations multiple times now, I have used them during football games and the performers has been very well with very clear voices just as advertised. but on the first day when I first used them in a football game at a certain point the Voice sounded like kind of acoustic robotic sound when the referees and I were talking together this only lasted for about 30 seconds and it wasn't constant, I contacted the supplier for the problem that I had and they helped me identify and explained what the problem is, but not to worry, the problem was not that big I'm not sure if it's only from that Stadium, but from other stadiums I haven't encountered the same problems. I would very well recommend this to a friend.