This is the I/O Circuit Board with WWAN / WiMax Wireless Connector and SIM Card reader, Audio ports and two USB 3.0 ports for the Dell Vostro 3450.
Compatible Dell Laptops/Notebooks:
Vostro 3450
Dell Part Number: 86G3N
Alternate Part Number's found on board:
DAV02PI16E0
32V021B0000