Skydroid T12 RC Controller, User Comment ?
 

Hi. I want to use Skydroid T12 RC Controller. It need to flight my drone with 5-10 Km. I choose 2.4 GHz because of 900 Mhz communication module and 5.8 Ghz video transmission. If there is not any good 2.4Ghz RC controller option, I can change communication module and I use 900Mhz RC Controller.

First of all, keep all you questions about transmitters in one topic.
Then you ask about very specific use for a drone while this basically is a RC car forum.

And for FPV there are better forums to find.

But for your use I can tell you no stock transmitter will work. People working on such a range use specific long range beam antenna's with even signal boosters which are in many countries are not legal.