This is a replacement Backboard + internal XJT module as used on the Taranis Plus (Will not fit the older Taranis).
This board attaches to the backside of the Taranis Plus case. It includes the USB, Audio and Trainer ports as well as the internal XJT module and SD card slot.
Your existing antenna must be unsoldered to remove your existing backboard so the replacement board can then be installed and the antenna connection will need to be soldered on.
This soldering process requires GOOD soldering skills to avoid damaging your new board.