ITEM NAME:2x LED Polarity Converter Negative Switch Harness Adapter for H4 Xenon Lamp #gib Store Home Promotion Hot Item Add to Fav.1 Pair Car LED Headlight Reversed Polarity Converter Positive Negative Polar Switch Harness Adapter for H4 Xenon Lamp Light Black. Polarity converter, negative pole to positive pole, positive pole to negative pole, can be used for all kinds of cars.
