Maui, there is a product that is used in almost every santioned racing form, Indy to Nascar. This unit has a sensor to adjust for ambient noise. The unit allows for a voice activated intercom bike to bike, rider to passenger. All while supporting a radar detector, cell phone, or a music source.
Autocom, is the product. the unit mounts in a tank bag or on the bike itself under the plastic. From the helmet there is only a single lead to connect, nothing on the side of the helmet as the other systems. Bike to bike is served through either a Kenwood (military grade) or Motorola 2 way radio with voice activation (no stupid buttons to push while talking).
According to Chris the Autocom importer most of his customers are people who have owned other systems and became unhappy with them.
There is only one downside, it is not cheap.
But then what good is a cheap radar detector, when you pay the judge. Point being some things cost more for a valid reason.
I use an Autocom with a Valentine and did not interview with a policeman in 99. Last summer five of my riding buddies collected speeding tickets when I was not riding with them.
Three of them are purchasing Valentine's and another is also opening the wallet for the Autocom unit as well.
Pay now or pay later and later again with insurance surcharges, fines, and loss of work!