CISCO AIR-ANT5135SDW-R= Aironet Very Short 5-GHz Omnidirectional Antenna Type: Antenna Specifications: Antenna type: Omnidirectional Operating frequency range: 5150-5850 MHz VSWR: 2:1 or less Peak gain: 3.5 dBi Polarization: Linear Azimuth plane 3 dB beamwidthl: Omnidirectional Elevation plane 3 dB beamwidth: 40 degree Length: 1.7 in. (4.3 cm) Diameter: 0.75 in. (1.9 cm) Connector: RP-TNC jack Environment: Indoor only