he DFS-A0121 combines the DF-A0121 and DF-A0054 in to one compact antenna system.
The DF-A0121 is a 5-channel, dual band compact Direction Finding antenna suitable for use in mobile or static applications.
The DF-A0054 is a band switch designed to complement the capabilities of the DF-A0121 and is installed in a protective housing below the antenna.