1.This T20/3157/4157 LED light decoder wiring harness is made of high quality material and can be used for a long time. 2.It can stabilize the voltage fluctuation, prolong the service life of the LED bulbs and improve the lighting safety. 3.This T20/3157/4157 LED light decoder wiring harness is universal for most vehicle models on the market, you don't need to worry about mismatch with your car. 4.It is very easy and fast to install, plug and play. 5.Package: You will get 2 x T20/3157/4157 LED light decoder wiring harness with 50W 60 Ohm resistor power.