2pcs Rf Adapter Connector Sma Male to Mmcx Female for Wireless Antenna MMCX connectors are most commonly seen on Wi-Fi PCMCIA cards as antenna connectors or as connectors for external GPS antennas on small devices like PDAs or GPS receivers. They are also used by various brands of in-ear monitors to connect the cable to the individual earpieces. This allows for the cables to be replaced or swapped The SMA interface is a connection, also known as an SMA connector. Suitable for applications in the microwave range up to 26.5GHz. Applications such as telecommunications, networking, wireless communications, and inspection and measurement instruments. Used as a connection for RF signals 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 buy it use it and you aren"t happy with it,tell us and refund money give you