802.11g 54Mbps Wireless lan USB adapter extenal connector is RP-SMA female Under patent applying 802. 11g 54 Mbps WLAN USB adapter with the function of adding external high gain antenna. You can use it directly ,also connect oudoor hi gain antennas. The connector is RP SMA Female so please select RP SMA Male cable assemblies. Transmit power is 15dBm and transmission distance is quite long. It is suitable for travel and can improve the signal for your laptops.