RG-AirMetro460G 1 x 10/100/1000 Mbps Port 15 km, 23 dBi 5 GHz, 867 Mbps RG-AirMetro460F 1 x 10/100 Mbps Port 15 km, 23 dBi 5 GHz, 867 Mbps Signal Enhancement The Secret of Circular Grace Compared with Square Antenna: The total gain of the circular is increased; The gain i...