Shakespeare Style 396-1-AIS VHF Marine AIS 4" LENGTH 3dB 4" MAST MOUNT AIS ANTENNA The 396-1-AIS has been specially designed to meet the broader bandwidth requirements of all popular AIS transceivers. Commercial-grade construction with a mast mounting sleeve. Brass and copper elements SO-239 connector at the base Suggested Mount: U-Bolts included. Can be strapped to a larger mast using steel banding (not supplied) One section Coax cable sold separately Shakespeare Limited Warranty: 2 years Technical Specifications: Frequency: VHF Marine Band Bandwidth within 2.0:1 SWR: 6.0 MHz SWR: 1.5:1 at 156.8 MHz Gain: 3dB Impedance (Ohms): 50 Gain: 3dB Max. Input (Watts): 100 DC Ground: no (will read open-circuit with ohmeter test) Termination: SO-239 at bottom of antenna Height (feet): 4 Polarization: Vertical Radiation pattern: Omni-directional