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 Key FeaturesFor use with PPA T45, PPA T45NET and PPA T27 TransmittersScrew-to-PCB style connectorUse with large-area FM transmittersFrequency 72-76 MHz FM SpecificationsConnector type: Screw to PCBNominal Impedance: 75 OhmsLength: 9"Shipping Dimensions: 9" x 3⁄8" x 3⁄8"Shipping Weight: 0.08 lbs.