Reverse polarity converters, ideal for led lights with H4 connector. For example in Suzuki Samurai in many cases by changing the main halogen headlight for a lead one that the installation is inverted. With this 2pcs H4 reverse polarity converter pack it's very easy to fix that glitch.

Polarity converter, negative pole to positive pole, positive pole to negative pole, can be used for all types.

Applicable to resolve most modified headlamps, the light is not bright or cannot be dimmed or the dimming switch is hot and so on.

The decoder contains a high-efficiency interference absorption circuit, which reduces the ballast interference pulse to less than 1/10 of the original, eliminating interference from the ballast to the driving computer.

This decoder is easy to wire and totally waterproof.
Even if it's connected to the negative pole, it won't burn the decoder, and the quality is stable.