... can choose different radiation pattern, azimuthal angle, polarization style and different antenna gain according to the actual coverage. Features 1 ... 800W. With 0.5 -1.5 degrees beam declination and null fill, which solve the Coverage Problems at transmitter tower ... , it waterproof, dust, air pollution, erosion4. Firm structure, easy and convenient for installing, maximal wind velocity reach to 200km/h ...