... yagi antenna have well-presented , easy install and can work long time outdoor. Yagi antenna specification: Specification : Input Frequency: ... 9.5dB,11dB,12dB,13dB,16dB. (can select) Front to back ratio:≥12dBVSWR:≤1.5Input impedance:75ΩPolarization:V/HMax ... your services?Re: Factory supply directly,OEM service available,Supply high quality after sale services . More Information and products , please ...