We tried the Retevis H777 this season and we'll be getting something better next season. There's interference when you push to talk on some of the radios and there's squawking but no one is using them, just comes on from time to time. It's hard for the wing guys to hear each other, the range isn't that great no matter what channel was used and volume on high. Basically we found it very difficult to communicate with one another and have stopped using them.