This complete kit includes everything you need to install 4" round high intensity LED taillights and 2-1/2" round LED reverse lights into the Poison Spyder Crusher Corners on your Jeep JK Wrangler. AT A HUGE SAVINGS over purchasing these items separately! Poison Spyder's JK LED Taillight Harness system is the easy, plug-and-play answer to getting all of your Jeep Wrangler JK's rear LED lighting working quickly and correctly. It is designed to connect directly to your Jeep's OE wiring harness, and directly to LED taillights, back-up lights, and license plate lights sold by Poison Spyder.