Yagi antenna frequency can customized 1.high gain 2.signal quality stability 3.Receiving distance 4.Anti-interference Our Yagi ... Gain:7dBi,9.5dB,11dB,12dB,13dB,16dB. (can select) Front to back ratio:≥12dBVSWR:≤1.5Input impedance:75ΩPolarization:V ... your services?Re: Factory supply directly,OEM service available,Supply high quality after sale services . More Information and products , please feel ...