ITEM NAME:2pcs H4 Headlight Kit Canbus LED Decoder DRL Anti-Flicker Load Resistor Description: High quality and long service life. Easy plug and play, no modification needed. Solve error message on dash board and headlight flickering issue. Work with all aftermarket LED kits: H4 2 pieces error canceler decoder kit for LED headlight, fog light. Specification: Type: electronic Size: approx.30x3x3cm Voltage: 9V-16V Package Includes: 2 Pieces Anti Flicker Error Decoder Note: It will not work on Switchback LED bulbs! Please check the model before ordering. If there any question, please.2 Pieces Anti Flicker Error Decoder. 2 pieces error canceler decoder kit for LED headlight, fog light. Easy plug and play, no modification needed. It will not work on Switchback LED bulbs! High quality and long service life.