TUNNKIT LED Warning Canceller & Noise Canceller for H11, H8, H9 LED Headlight Conversion Kit-CANBUS Adapter for BMW, VW, VOLVO and More TUNNKIT LED Warning Canceler offer a solution to stop error warning, radio noise or other "CANBUS" error problem after installing LED headlight conversion. Compatible with BMW, VW, VOLVO and More. Compatible with all H11, H8, H9 TUNNKIT LED Kits, including Polaris, Comet and Titan. Easy and Simple installation. Usually takes less than 20 minutes! "Plug-and-Play" in most vehicles. No Modification is Needed. While some vehicles may need professional installation Package included pair of warning-cancellers