These NEW Omni-directional antennas are designed for use with our Wireless Servers, Hosts and Repeaters to offer the maximum range available to your Scigiene Wireless System. Each application has different antenna requirements as determined by the desired transmit distance, line-of-sight conditions and network architecture. These are base station antennas with a heavy wall, gold anodized 1 1/4" aluminum mounting sleeve and precision copper clad elements sealed in white ultraviolet inhibiting fiberglass radom for weatherability. Factors that affect the performance of the antennas are RF Cable length, height of antennas off the ground, obstructions, radiation pattern and gain of the antennas. There is a 2dBi gain loss per 100' of cable.