These new Killer RC™ Double Iris LEDs have a ring around the perimeter that gives them a unique look. The Iris LEDs allow you to add some cool lighting on your RC without spending a lot of money, or using up much battery power. Add realistic looking headlights and tail lights to your lexan RC body. Light up your chassis, or use them as underglow lights. These work awesome with the Killer Kontroller light controller, or you can just plug them into your rx battery power with a splitter cable. The wiring is 32" long. 4-11vdc. Each Iris light is 10mm wide. The LED itself is 5mm wide.