Williams Sound ANT 021 Rubber Duckie Antenna For use with PPA T45, PPA T45NET and PPA T27 Transmitters; Screw-to-PCB style connector; Use with large-area FM transmitters; Frequency 72-76 MHz FM For use with PPA T45, PPA T45NET and PPA T27 Transmitters Screw-to-PCB style connector Use with large-area FM transmitters Frequency 72-76 MHz FM