Feature: 1. MAIN PURPOSE: This headlight relay harness is used to repair car with 2 pcs H4 plug headlights, such as 7x6 LED headlights. 2. IMPROVE BRIGHTNESS: The headlamp relays can solve the problems such as dim lighting, flashing, rear feed power supply, failure when using high or low beam lamps. Greatly improve the visibility of car at night. 3. 2 RELAYS: Built in 2 relays, with high temperature resistant ceramic headlight sockets, can effectively preserve car circuits in case of any abnormal situations. 4. EASY TO INSTALL: The headlamp relay harness adopts quick connect and socket type installation, easy to install and can be used directly. 5. LONG LIFE: The headlight wiring harness is a perfect upgrade part for your car, with long electrical and mechanical life. Specification: Item Type: Headlight Relay Harness Material: PC Relay: 12V 40A Pickup Time: ≥15ms Electric Shock Resistance: ≤50mΩ Insulation Resistance: ≥100MΩ Environmental Temperature: -40℃ to 125℃ Service Life: Electrical 100000, Mechanical 10000000 Dielectric Withstand Voltage: 500VAC Between Open Circuit Electric Shocks, 500VAC Between Coil Electric Shocks Installation Form: Quick Connect Type, Socket Type. Package List: 1 x Headlight Relay Harness4 x Cable Tie Note: Before assembly, please know the model with a working voltage of 12V. This headlight relay harness cannot be installed with a voltage of 24V.