Wilson 901141 Window Mount allows for using a wide-band panel antenna as a replacement for a regular outdoor Yagi or Omni antenna. This is particularly valuable for tennents with no roof access or the right to modify outsides of their rented appartments. This item helps to greatly increase signal quality by allowing you to mount your antenna to any window with ease. The mount itself requires no hardware to set up, instead using large suction cups to secure the mount and the panel antenna you place inside to the window. Note that the panel antenna inside the window mount must face the window (and thus the outside of the house or building). It should not be mounted outdoors and cannot be modifier to allow the antenna to face away from the window. It needs to be used as intended for turning a panel antenna into a tower-facing, inside-mounted outdoor antenna.