looking at the manual think that is exactly what that is, (top of page 1).
my old traxxas tq2/tq3 controllers (27mhz) had that, could only use it on a few escs i had because it would not allow far enough to trigger the esc to go to reverse. nitros though it was pretty nice, one of mine i seem...
JR also makes them, XS3, and the XS3i i think.
@golfmonke if you would post a picture of the receiver to confirm synthesized or not that would be easier to know which you have.
crystal type or synthesized?
its been awhile since looking back to the 75mhz but iirc (someone else please confirm or deny this) but should be able to swap back and forth between brand just need the same frequency of crystals.
for 27mhz anyway i would use HPI/TRX/Exceed/futaba controllers with...