The description clearly states that it includes a relay and terminated wiring. it does not, it contains a DIY kit. The wiring kit described is sold for another $39. Make sure you factor that in to your comparison.The lights are well made, although I am concerned about rust on the painted steel housing, the mounting is solid and the hard plastic covers fit good and snug.I did contact KC regarding the lack of described parts but they said it was my issue to take up with Amazon. If they will not stand behind their product from day one what will they do for the remaining 23 years of warranty? I think I will return these and go with a leading brand.