Cisco Aironet 3.5-d Bi Articulated Dipole Antenna operates in the 5-GHz frequency band & is designed for use with Cisco Aironet 5-GHz radio products using a reverse-polarity Neil Councilman connector (RP-TNC). The antenna has an articulated base that can be rotated 360 degrees at the connection point & from 0 to 90 degrees at its knuckle with detents at 45 & 90 degrees.