1. H4 Headlight Pigtail ceramic socket plugs ,designed to act as a heatsink for plastic-housing headlights, No melt or burnt even you use 100W lights.
2. Socket Type : H4/ 9003/HB2.
3. Voltage:12V, wire gauge: 14AWG, maximum allowable current: 9.4A, allowable current of natural operation 8.2A
4. If PINs on your vehicle are not standard to guarantee your 4"x6" 7"x6" 5"x7" work normally like neither low beam nor high beam work on your vehicle, this H4 Wiring Harness is needed. It will make your HID/LED /Foglight retrofit easier a lot.