DJI FPV Goggles : what is the "A" displayed on the left side of it ?

[dizzy33]

Hello,

Can someone please tell me what is the "A" displayed on the left side (external side) of the goggles ?
Is it something we can change to another letter ? I could not find any information on the official documentation ...

 

[Kilrah]

The selected RF channel, A=Auto

 

[dizzy33]

OK, thanks a lot !