Potauto Headlamp wiring kit can be used to brighten you vehicle headlamps by changing your vehicle bulbs from lower wattage to higher wattage. It is suitable for all cars and LCV which comes with H4 Bulb only. The headlamp wiring harness with dual head lamp relay is manufactured using heavy duty auto cables with ceramic bulb holders .The harness has individual fuse for both high beam and low beam. The fuse holder is also made of ceramic. The ceramic parts are used to withstand heat. The relay has a voltage of 12V / 40A. Designed to easily install 100W/130W H4 bulbs. Its very easy to install, however It is recommended to take professional help for installation.