This is for a Set of stock H4-H1 Adapters with a Power Control Unit (Automatic Power Selection Harness) for all Dapper Lighting Projector Kits. This adapts your stock H4 plug to H1 bulbs.
Includes:

• (2) H4-H1 Adapters with Power Control Unit (Automatic Power Selection Harness)

For HID kits: This must be used in addition to our Dapper Lighting Projector Relay Harness to have high/low ability.