... salt fog corrosion. Advantages: The yagi antenna have strong directivity , high gain, signal stability, receiving distance, anti-jamming characteristics and so ... .5dB,11dB,12dB,13dB,16dB. (can select) Front to back ratio:≥12dBVSWR:≤1.5Input impedance:75ΩPolarization:V/HMax power:50WLighting ...