The Dell 9NY2W AC adapter supplies power to compatible equipment. Its 7.4 mm tip connector identifies this version among Dell adapters, so check that the connected device calls for this connector and the stated output.
It provides 19.5 V DC and up to 180 W of output power. These specifications describe its electrical output and help identify it as a replacement power source for compatible Dell equipment at a desk or another location with AC power. The exact part number, connector size, voltage and maximum power distinguish this variant. Package contents are not specified.