we used these raidos in the 2021 baja 1000 from Ensenada to la paz, chase teams had radios and we had these on the bike with ptt. the antenna has to have a clear shot to the sky and they work amazing, we had coms 99% of the way with no issues at all we could contact our team from over 700 miles away clear as day. if you needs coms with no sacrifice this is the way to go hands down. pci was awesome in helping us get it all setup and working and it was a walk in the park. thank you again pci for everything.