Cisco AIR-ANTM2050D-R=, Directivity Omni-directional, Frequency Band UHF, Frequency 2.40 GHz to 2.40 GHz, Antenna Gain 2 dBi, Connector RP-TNC. The AIR-ANTM2050D-R antenna operates in the 2.4- and 5-GHz bands, and is designed for use with spatial-diversity access point (AP) systems. The AIR-ANTM2050D-R antenna is compatible with Cisco 802.11a/b/g radio products.