Kensun HID Anti-RF Interference EMC Filter Warning Cancellers - 1 Pair EMC Filter eliminates RF interference to your car radio Contains Resistor & Capacitor to prevent error message and eliminate flickering problem Easy to Install, No Modification Necessary. Simply attach it between the ballast and the stock harness. Kensun EMC Filter Warning Canceller is compatible with virtually all aftermarket single beam HID conversion kits Includes: 2x Kensun High Quality EMC Filter Warning Cancellers