This tutorial is applicable to BF4.4 and above firmware

SpeedyBee-TX ULTRA（CE） .json

SpeedyBee-TX ULTRA（USA）.json

SpeedyBee-TX ULTRA（EU）.json

Wiring diagram: https://docs.speedybee.cn/fpv/vtx&vrx/tx-ultra/wiring-diagram-of-tx1600.html

Connect the flight controller to your computer and open Betaflight.

Go to the Ports tab, find the UART port where your VTX is soldered, and set the corresponding Peripherals to IRC Tramp.

Click Save and Reboot.

Open the Video Transmitter (VTX) tab, then select Load from File.

Select the corresponding VTX table file and click Open. (This file can be downloaded from the official website, or you can contact official support to obtain it.)

After opening the file, select the frequency band, channel, and power you need, and then click Save.