Wilson 304452 Window Mount Panel Antenna is a 50 ohms wide-band antenna designed to be used with one of our amplifiers and features up to 10.6 dB of gain. The Wilson 304452 improves signal transmission between your Wilson amplifier and your nearest cellular signal tower. It is built for fixed installations and should face the nearest cellular signal tower. This panel antenna is utilized differently that the other indoor phone-facing panel antennas as it is intended to replace an outdoor Omni or Yagi antenna. This antenna is designed to be mounted on the inside glass-surface of your window facing the outside of the building towards your nearby cellular tower. It is a viable choice when a typical outdoor antenna (Omni or Yagi) cannot be easily mounted on the roof or high exterior wall. It is suitable for apartments and condominiums with limited exterior property modification access. So it is possible that your 50 ohm amplifier system will utilize this panel antenna to face the tower and another panel antenna (with wall, ceiling, or pole mount) to face your cellular devices. This is completely fine as long as adequate separation between the two panel antennas exists.