The LED decoder is mainly a part of the model for the failure of the LED lamp.

Main function: most Ashkenazi (Volkswagen, BMW, Mercedes Benz car) in the modified LED, because the original car halogen lamp is 5W, and the power of the LED lamp is 1-3W so the driving computer will check out the power do not match, resulting in failure, not bright or Flash no law and so on, it must be equipped with LED decoder to remove the fault caused by the modification of LED lamp light after the alarm