The Purelux ProSerie relay wiring harness is a solution for easy and convenient installation of additional lights. This wiring harness contains everything you need to connect additional lights! Other relay wiring harnesses on the market often require additional connectors, etc. depending on the connection method, but this relay harness has everything you need. Depending on the model, the Purelux relay wiring harness can be used to install one to four high beam headlights. A wiring harness with one connector is sufficient for connecting a single light, but if you intend to add another (or more) light in parallel at some point, it is worth buying a wiring harness with at least two places, from which you can leave the extra connectors unused at first. The wiring harness is suitable for direct 12V power.