Goliton 2.4GHZ 20DBI WiFi Antenna Signal Booster RP-SMA Wireless WLAN Antenna for PCI Card USB Modem 20dbi Directional Antenna.Max gained 20dbi,provide more signals. RP-SMA male connector 2.4GHz Wireless WLAN Antenna Aerial. Connector:RP-SMA (male) (No pin inside). Shape: Cylindrical. Frequency:2.4G.