This is a new, unused item. It has been opened once to check the product. This is a 65W AC adapter with a built-in cable that allows you to charge laptops from different manufacturers simply by swapping the connector. It comes with four interchangeable conversion connectors. It widely supports major manufacturers such as Dynabook/Toshiba/Fujitsu/HP/DELL laptops with DC round ports, and Lenovo/NEC laptops with DC square ports. It eliminates the hassle of carrying an AC adapter when traveling or working remotely. It is also convenient when switching between a home and work computer.