Ubiquiti AF-3X-US airFiber Mbps+ Backhaul, 3GHz US. The airFiber 3X is a wireless point-to-point backhaul radio that uses proprietary Hybrid Division. Ubiquiti airFiber 3X 3GHz Backhaul Radio Go Wireless NZ, AF-3X. EPCOM: AF-3X-UBIQUITI-NETWORKS - High Capacity Backhaul Radio, airFiber Technology up to Mbps*, 3 GHz ( MHz*).