2pcs Rf Adapter Connector Rp-sma Female to Mcx Male for Wireless Antenna MCX connector are frequently used to connect external antennas to GPS receivers. They are also common on USB DVB-T tuners for computers and laptops, to connect an external antenna to the tuner SMA connectors can be visually confused with the standard household 75-ohm type F coax connector (diameters: Male 716 inch (11 mm) circular or hex; female 38 in (9.5 mm) external threads), as there is only about a 2 mm difference overall in the specifications. Type F cannot be mated with SMA; this connection is possible using an adapter. It has a frequency bandwidth, excellent performance, high reliability, long life characteristics application for Antennas, Wireless LAN Devices , Coaxial cable, Wi-Fi Radios External Antenna and so on