That will be the main board for the WIFI II. We recommend replacing the module as well, as the two parts are synced together, and replacing one part might not resolve the issue they may be facing. Below is the part numbers and pricing for both parts.
BWIFI-DB-PCB-V2: WIFI II MOTHERBOARD ASSEMBLY (BLACK ACRYLIC FACE PLATE)
List Price: $865.00
Your cost: $450
BWIFI-PCB-V2: PCB FOR WIFI II (BLACK ACRYLIC FACE PLATE)
List Price: $270.00
Your Cost: $145