Low beam consists of three high-power advanced optical D lenses and a DRLHigh beam keeps low beam illuminated and adds two additional advanced optical D lenses with three projector senses for an incredibly wide optical patternMade from heavy-duty, lightweight die-cast aluminum, the low-profile housing requires no trim ring and offers a plug-and-play installationDurable polycarbonate lens for long-term durabilityPlug-and-Play H4 connectorMade in USA