Really cool. I used them on my kid's ATV racing helmet and on mine as more or less a radio so I could talk to him while he was doing laps. It was our first time doing this, so it was really cool to not only be able to talk to him and get him to hear me, but vice versa. I'm really surprised at how clear that was and how the units were able to hide or mask the wind. The range is also very impressive as we never lost range or connectivity. Well please, and I highly recommend them.
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