2X Choose Socket (3157-A/3157-B) LED Decoder Adaptor Warning Error Canceller Turn Signal Lamp Anti Flicker Set (Socket: 3157-A) 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 There are 2 different kind of 3157 adapters( A type and B type ). Please double check the adapter to see if it will fit into your car or not. (You will get the exact decoder you see in the picture.) Applicable to Most Auto Car Vehicle Automobile with 3157-B Socket or 3157-A Socket. his 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. Package includes: 2x 3157-A/3157-B LED Decoder Adaptor -- Voltage: 12V -- Working Wattage: 8W -- Material: High Quality ABS Housing -- Cable Length: Approx. 27cm (with LED decoder)