Universal adapters are devices designed to connect various types of plugs and sockets, allowing electronic devices to be used in different countries. They typically feature multiple input options, accommodating different plug shapes and sizes, making them essential for travelers. These adapters do not convert voltage; they simply allow devices to fit into foreign outlets. It's important to check the voltage requirements of your device to avoid damage. Many universal adapters also include USB ports, enabling the charging of multiple devices simultaneously, such as smartphones and tablets, while on the go.