The Wilson 311203 (formerly 301202) is 50 ohm Multi-Band Omni Directional Antenna designed to be used with one of our amplifiers and features up to 5.1 dB of gain. This outdoor antenna receives signals from all directions, and should be mounted in the area with the strongest signal. The included mounting hardware allows the antenna to be installed vertically on a pole and improves signal transmission between your Wilson amplifier and your nearest cellular signal tower.