Waterproof and dustproof: The cigarette lighter socket features a waterproof cover that effectively protects the internal circuitry and extends service life. 15A fuse: The cigarette lighter extension cord includes a replaceable 20A fuse for enhanced safety. Cigarette Lighter Extension Cord, 4M (13 Feet) Length, 17AWG Gauge. Versatility: Compatible with various vehicle accessories such as tire inflators, car audio systems, vacuum cleaners, car refrigerators, and more. High efficiency: Features a thickened copper core for stable current transmission and high performance. Red wire indicates positive polarity; black wire indicates negative polarity. High-quality materials: Supports 12V-24V high-power output. Constructed with durable bakelite material for high heat resistance and efficient heat dissipation. Equipped with manganese steel contacts for improved conductivity and stability. Includes power indicator light.