(Pack of 2) LED Decoder 3157-A Adapter Anti Hyper Flashing Error Cancel CAN-bus Kit Safe and easy to use, Please make sure your have standard 3157 socket and need decoder instead of resistor., Applicable to Most Auto Car Vehicle Automobile with 3157-A Socket. This decoder will work for European vehicles such as Audi, BMW, Mercedes, Porsche, Volkswagen or domestic vehicles for fog lights and ensure the LED bulbs light up full power without malfunction issue nor flickering issue. Built-in Decoder & Resistor. High Quality ABS Housing ensures the secure temperature range Cancel Error message cause by OBC (On-Board Computer) Check. Cancel Hyper Flashing on Turning Signal. Cancel Hyper Blink on LED LED Decoder, work only for car that need decoder to cancel hyper flashing on LED turn signal upgrade, Reduce the Power on LED light so that can work better. No Cutting or Splicing. Plug & Play. Simply twist your LED bulb onto the base, and twist the other end into your existing bulb socket. Package includes: 2x 3157-A LED Decoder Adaptor