Use this 2.4Ghz omnidirectional antenna for up to 4x more coverage than the standard AIR-ANT-4941. This antenna will add and ADDITIONAL 7 dBi. The AIR-ANT4941-EXT can be used with all Cisco access points equipped with a RP-TNC connector. When using the AIR-ANT4941-EXT, you are enabling a 70 degree E-Plane and omnidirectional H-Plane beamwidth for indoor applications. For the best results, we recommend buying three or four per access point where applicable. This would be the best for a small office of lecture hall. You will find these antennas to be the most effective in offices, classrooms and hallways.