FrSKY ACCST 2.4GHz TX Module & Receiver Upgrade Lite Adapter (FUL-1)
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FrSky Receiver Upgrade Lite to use with you USB cable to update your Frsky receiver/module.
This adapter may also be used as a level converter for modified 9X radio installs with the FrSky system.
You can find the Instructions for the FUL-1 on our Forums.