Kensun HID Xenon Conversion Kit with "Slim" Digital Ballasts - 9004 (HB1) Bi-Xenon - 6000k Plug-'n-Play - installs in 20 minutes or less (no wire-cutting or special skills required) 100% Water-proof, 100% Dust-proof, 100% Shock-proof Included in kit: 2 slim digital ballasts, 2 bulbs, Relay harness, Installation instructions, Smart aluminum carry-case HID Xenon for both high and low beams Produces 2 to 3 times as much light as a halogen bulb