The Dell 450-AARU is a 240 W AC adapter with a 19.5 V output, intended to power compatible equipment from an AC source. Its exact part number identifies this adapter configuration.
The output connector is 3-pin, 7.4 mm. Check these details when matching the adapter to equipment that uses the same connection format.
The described configuration includes a C14 power cord. Together, the output rating and connector format identify the confirmed characteristics of this Dell adapter.