Connect directly to your 12-volt adapter; use two of your favorite 12-volt devices at the same time, like a tire inflator, vacuum, coffee maker, USB charger and more;Designed for safety; built-in fused connection for protection against short circuit;Weatherproof; a water resistant cap to protect the female socket from the elements;Maximum performance; made from a high-conductivity 16 AWG copper wire and a rated capacity of 15-amperes;Rugged design; molded strain reliefs prevent unwanted strain on the wire connections