ETC Congo Family v6.4.0 - Manual (Page 216)

214
System Settings - USB RFR
You can set HF (frequency) and Network ID (group) for each RFR remote. Simply make sure
they correspond to your remote settings. You can also update the firmware of your RFR
base unit and remote. For more information see
Remote Control - RFR Radio Remote .
For the remote to work both base station and console need to be set to the same HF and
Network ID.