Trusted by boaters worldwide, including the Coast Guard, these antennas are reliability and high quality every boater desires. Designed to reduce rough sea signal fading using field tested elements, you can trust these antennas to bring you the highest performance and quality you would ever dream of. Maximum Power Input: 50 watts SWR Nominally: 1.5:1 at 156.8 MHz Bandwidth: 5 MHz within 2.0:1 VSWR Frequency: VHF Marine Band Antenna Gain: 3dB Ferrule: Chrome plated brass with standard 1"-14 thread Coax Supplied: 15 ft of RG-58 Connector Supplied: PL-259 (Not installed) Polarity: Vertical Impedance: 50 Ohms No DC Ground. The antenna will read open on continuity test Suggested mount: 4187 or 5187 Ratchet Mounts (Not Included) Brass and copper elements One section