" but he gave me one that says JR or Airtronics TX only. I'm using hitec prisim and Futaba sue 8 radios. what is the difference? "

Flats: I don't think that you have a choice. JR & Airtronics use a posative shift pulse, and Hi-Tec & Futaba use negative shift. I'd get right on the horn to them and have them straighten it out.

Tell them to send it Overnite Express, it was their mistake.