This is an optional Traxxas Unlimited Desert Racer Rear LED Light Bar. Brake lights should function like brake lights. That’s why the Desert Racer’s light kit recognizes the difference between braking and reversing. The rear multi-color LED light bar 8487 features both yellow class lights and red brake/tail lights. The rear light bar secures directly to the frame for unparalleled strength. (Requires 6590 Power Amplifier)