... than 0.3% defective hid kit/ hid conversion kit/ hid xenon kit include:2 bulbs; 2 ballasts; All necessary fitting; user ... manual . The advantages of hid xenon kit:High Brightness Standard halogen bulb 800LM, HID 3000LMLong Life ... Installation Only need to input the origin hold in the xenon ,fix the ballast, not necessary to change any other original ...