Cisco Aironet Very Short 5-GHz Omnidirectional Antenna (AIR-ANT5135SDW-R) 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 beamwidth): Omnidirectional Elevation plane (3 dB beamwidth): 40° Length: 1.7 in. (4.3 cm) Diameter: 0.75 in. (1.9 cm) Connector: RP-TNC jack Environment: Indoor only Operating temperature: 32° F to 131° F(0° C to 55° C)