An extension cord is a flexible electrical cable that allows you to connect multiple devices to a power source from a distance. It typically has a plug on one end that goes into a wall outlet and one or more sockets on the other end for connecting appliances or tools. Extension cords come in various lengths and can be used indoors or outdoors, depending on their design and rating. When using an extension cord, it's important to consider its capacity, which is measured in amperes. Overloading an extension cord can lead to overheating and potential fire hazards. Always check the manufacturer's guidelines and ensure that the total wattage of connected devices does not exceed the cord's rating for safe operation.