Transponder options are used in configuring race setup and determine how and if transponders will be tracked for a class in an event. See more on the race setup process at this link.
No Transponders - Results will not be determined by transponder numbers in a class.
Use Transponders (Allow Rentals) - Results will track transponder numbers for each driver in a class and the rental status of the transponder (Rented vs. driver-owned).
Use Transponders (No Rentals) - Results will track transponder numbers for each driver in the class, but will not track rental status.