I think most of them work hooked up to their radio so when sound is going through it it makes the voice box work. At least that is how I have mine set up until I can get some sort of voice activation in my car.

This was my first year at the Nationals and I had a blast. It was good to finally meet people from the boards and see their cars. There was a lot of nice cars and a lot of nice people there and I think that is what made it great. If anyone cares to take a look I have most of my pics posted on my sit...