DEVO12S for frsky, A7105 or other's?

Hello.

I have just bought one 12S.
Which module I have to buy for the frsky with telemetry.
I saw of A7105 and CC2500PA and the others.
I do not know which is the best to have a maximum of length. What procedure of installation to use?

Thank you for your help(assistant).
My searches(researches) in translated French are not effective.

Since no one has replied yet, I'll give it a go - but others know a lot more than I do.

Looking through this thread , it seems you want the CC2500. However, it also seems that it's still being developed, and the latest code has as yet to show up in the nightlies.

I'll repeat advice I've given elsewhere: Install it on a multimodule board. Minimal extra cost ($8 for a board) and work, and it means that adding a second (or third) module later is trivial.