Ham Amateur Base Station Antenna Tunable GMRS Vertical Base Antenna 70cm 390-470MHZ 100W 6.0dBi SO239 Connector with Scale Mast

Tunable Base Antenna,Length adjustable
Adjust the length of the antenna according to the frequency you need(Unique calibration design)

Electrical specifications and Mechanical specifications
Frequency Range    390-470MHz
Impedance    50Ω
VSWR    ≤1.5
Gain    6.0dBi
Horizontal Beam Width    360 Degree
Vertical Beam Width    17 Degree
Polarization    Vertical
Lighting Protection    Direct Ground
Dimension/Height    940-1100±10mm
Hold Pole Diameter    Ø30-Ø60mm
Material of Hardware-supplied    Aluminum Alloy
Connector    SL-16K (FEMAL)/ UHF FEMALE / SO239
Radiating Element Material    Aluminum Alloy