The Dell 492-BCWW is a 90 W AC adapter for powering a compatible notebook. Its 19.5 V output and compatibility with Dell reference 0Y4M8K help identify the setup it is intended to replace.
It has a 3-pin, 7.4 mm connector, so check that the notebook uses this connector configuration. The product listing specifies that a C6 power cord is not included; this version is supplied without that cord.
Use it as a replacement power supply for a notebook setup compatible with the specified Dell reference.