NOTE: This item cannot solve DRL flicker or none lit up problem. Fitment: For H4 Plug Please do remember send message to tell us your LED bulb type, and car make, model, year. If you have any questions just send us message via e-mail. This is Error Free Load Resistor LED Decoder canbus, it can solve the following problems: Anti flickering deocder that solve flickering or strobe effect issues when installing aftermarket LED kits. Cancel Error message cause by OBC (On-Board Computer) Check. Package Included: 2x H4 canbus wiring harness adapter .