The YX023-PCS is an optional (outdoor) signal antenna upgrade for the YX500-PCS which provides additional signal strength in interior spaces and is used to increase the area of improved cell coverage. The antenna is recommended for areas with weak outdoor signals strength to provide peak system performance. The YX023-PCS antenna replaces the omni-directional signal antenna and provides 13 dBi of gain. All hardware is included to mount on masts up to 2 ½” diameter. All hardware is included to mount on masts up to 1 5/8” diameter.