100% Original LAUNCH OBD2 Main Cable for CRP123i, CRP123e, CRP123x, CRP129i, CRP129e, CRP129x. LAUNCH X431 main cable can work together with LAUNCH CRP123i, CRP123e, CRP123x, CRP129i, CRP129e and CRP129x, used to connect machine and connector, then you can use it to diagnose your car.