What is it?
It is a SMA-IPEX antenna adapter. You can solder it on PCB.
Why did you make it?
When you develop ESP07 or ESP32-Wrover you always want to add a powerful antenna. But most of powerful antenna only have SMA connectors. If you want to use it on ESP-07 or ESP-32 wrover, you have to use this kind of adapter
What makes it special?
Connector A U.fl IPX IPEX1 / IPEX-4 MHF4 Female Jack
Connector B RP-SMA / SMA Female Jack 4-Pin Right Angle PCB Mount
Cable Type RF113, OD=1.13mm ; RF0.81, OD=0.81mm
Impednace 50 Ohm