HP 828428-001 LCD backcover with antenna is a display rear cover listed for HP ProBook 450 G3 and HP ProBook 455 G3 models. It is the version specified for models without WWAN.
The cover includes wireless antennas, along with foil and grounding wires. These are integrated into the display cover assembly, bringing the listed parts together in one replacement component.
This part is identified by HP spare part number 828428-001. Its purpose is to replace the display rear cover while retaining the antenna components described for this version.