ITEM NAME:2pcs HB4 HB3 LED Canbus Decoder Anti-Flickering Load Resistor Description: This listing features on 2 pieces of HB4 HB3 9005 9006 canbus warning error decoder canceler capacitor Anti-Flicker For LED headlights, fog lights. If you've installed LED lighting kit in your car but are getting a flickering or strobe effect and error or warning codes, then these code canceling capacitors are your solution. THEY WILL NOT WORK ON SWITCHBACK LED BULBS!!!!!!!!!!!!!!!!!!!!!!!!!! Specification: Voltages: 9V to 36V Work with HB4 HB3 9005 9006 headlights. Solve error message on dash board and headlight flickering issues. Easy plug and play, no modification needed. Package Includes: 2 Pieces LED Canbus Decoders.Work with HB4 HB3 9005 9006 headlights. 2 Pieces LED Canbus Decoders. If you've installed LED lighting kit in your car but are getting a flickering or strobe effect and error or warning codes, then these code canceling capacitors are your solution.