Designed specifically for rental karting facilities, the TranX140 Transponder requires no maintenance or upkeep. Simply mount it to the kart’s frame with supplied hose clamps, and it is ready to go. Each time it passes the start / finish line, the transponder transmits its unique ID and is recorded by the timing system. The transponder’s electronics have been specially designed to withstand the shocks and vibrations common in rental karting, and we back all of our products with a 2-year warranty.