The Dell 450-AADB is a 65 W AC adapter for powering compatible Dell computer equipment. Its 19.5 V output identifies its electrical rating. As an external power supply, it connects to the equipment rather than fitting inside it.
The adapter has a 7.4 mm output connector and a 3-pin C6 connector for the mains connection. Check that both connections match the intended equipment and power source; the listing does not name compatible computer models.
The 65 W rating and 19.5 V output describe its power characteristics, while the two connector specifications identify its interfaces. The product description does not state package contents.