The Taillights on your vehicle can be the most important safety feature, especially in the worst conditions. J.W. Speaker’s line of 4″ round heated taillights and signal lights make sure that your stay visible all year round. With SmartHeat built into each lens, these lights were built to beat harsh winters. These lights use a 3-pin Packard connector to make for an easy upgrade or retrofit to any vehicle using 4″ round lights.