Hello

I try to find a good Tx. I'm looking in internet checking the diference in characteristics and price.
I find out that were I live I can't use 75Mhz (is that the Frequency right? or is the Channel?).
Someone tell me that in some models is possible to change the "Frequency Module".
I really appreciate some lights about and also some recomendations.
Can i change the module in this Tx? JR XS3 Pro.

Thanks