I purchased these radios and headsets from Sampson Racing Communications in 2020. The entire setup was about $1800. This was pre-covid pricing, so I can only guess what this would cost to buy today. I used them for two races, and they worked great. This is almost everything you need to get your race team connecting. You will need the antenna for the car, the 12v power cord for the radio in the car, and the correct cord/speakers for your specific helmet.
The estimated range is 2 miles. With push-to-talk, you can keep your hands on the wheel!
There is a 6-place charging station as well as two individual charging stations, as well as some other misc cords that are included. I always stored all of the items together in a canvas bag, so that will be included too.