The Dell 450-16523 is a 90 W AC adapter for powering compatible Dell equipment. Its part number identifies the specific adapter when checking whether it suits your device.
The listed output is 19.5 V. A fixed lead with a barrel connector carries power to the equipment, while a detachable C5 cable connects the adapter to mains power. This arrangement suits a setup where the adapter stays connected to the mains and the output lead remains attached to the device.
The listing does not specify compatible computer models or confirm whether a mains cable is included.