Dual Color Changing Clover Shamrock LED Hitch Cover - Third Brake***PLEASE NOTE: If you have a newer model vehicle that's equipped with a lamp out sensor on your vehicle (typically found on late model Ford vehicles with tow package) You will need to purchase a separate adapter (click here for details) to prevent a false error message. During the day, it appears to be normal hitch cover showcasing a shamrock clover; however, hit the brakes and watch it do it's thing! Illuminates GREEN when the running lights are