Product updated on 2020-09-17, SBx Parts - SBX:LED:ULT9004, Ultimate decoder module for 9004 headlights / Pair, Solves DRL, Canbus and EMF issues. If your vehicle's daytime running lights operate at a voltage lower than 8V, then some LED kits won't even light up. Or if they do the low voltage will reduce their life expectancy. We have the perfect solutions for this, ,