ET001X EasyLap Micro Transponder Compatible with EasyLap & Robitronic Lap Counter systems. New smaller version 10.5X9.5X5.8mm. Includes cable for Mini-Z ASF, Pro, Evo, RWD/AWD RTR and 3 pin JST connector. If used on MR03 "Sports" or AWD "Sports" (blue antenna) ET009-S cable is required. The Easy Lap Micro IR Personal Receiver is part of an infrared lap timing system that has opened the doors to automatic and accurate lap timing for tracking your own progress, or to run a large scale event. This system is ideally suited to the Mini-Z which has evolved over the years to become more reliable and remain economic enough to serve the needs of Mini-Z enthusiasts across the entire spectrum of Mini-Z enthusiasts from fun level running with friends to large scale events.