Essentially, it's a short cable (260mm or about 0.26m) designed to connect a device with an MMCX connector (like a wireless miniPCI-express card) to an antenna with an RPSMA connector.
It's commonly used with MikroTik's BaseBox2 or BaseBox5 devices to add a second wireless interface, allowing for more flexible antenna configurations or dual-band operation.
MMCX to RPSMA pigtail,for adding second wireless interface to BaseBox2 or BaseBox5
