Product Features: Frequency Range: 144/430 MHz Impedance: 50 Ohm VSWR: less than 1.4 Gain: 3.5 dBi(144MHz) / 6 dBi(430MHz) Polizaration: Vertical Maximum Power Input-watts: 100 W Lightning Protection: Direct Ground Height: 37 Inches Radiating Element Material: Stainless Steel Connector: PL-259