BROTHER Communication Box for Brother Multifunction Printers BRB-30WH This is the communication box included with the Brother MFC-J820DN multifunction printer. Power-on has been confirmed. We do not have an environment to check the functionality, so we cannot answer inquiries. We apologize, but please understand that this is sold as-is (no returns, no exchanges). There is some overall yellowing discoloration. Thank you for viewing.