The male plugged into the cigarette lighter socket on the vehicle, supports 12V-24V DC voltage input. The extension cable build in 15a fuse to keep safe. 13FT heavy duty extension cords are available; use 16 gauge wire and widely application. Moreover, design with cap for water resistant and dust-proof. Led indicator design- it will be light up when powered on. This cigarette extension cord great fits all kind of vehicles, such as car, bus, RV, ATV, Trucks,van and so on. Multiple Safety Protection: It is made of quality heat-resistant material; Intelligent charging with overcharge, over-voltage, and overcurrent protection, to effectively protect charging devices. Compatibility used, 13ft length for various electrical chargers, widely used in traveling or camping, Air Pump, Vacuum Cleaner, Tire Inflator, Charger, Fridge, and more.