Actually looking in their manuals BE is the code for behind the ear, but only the Quattro has an 80 series (power) that I can find, but they changed to BEB80. So I dunno if that’s it.
EDIT
OK so all of Resound families use BE80 01 that just indicates a high end BTE. Not getting hits on the other numbers yet. One is a serial number unique to the device other shoukd be a part.
Are these US aids or someplace else?