Same system. The clip on transponders still work with it and some tracks still have it. Tracks have gone to using personal transponders for several reasons. No waiting to have transponders returned. No having to send in transponders for repair when they stopped charging(Mylaps I believe no longer services them). It gives means less headaches for the track. Also at least in onroad racers used dummy transponders when setting up their cars. This way the added weight would not change the handling. Now with personal transponders the transponder is always there.