kindly help NRF24L01+

ive seen this module , stated arduino compatible,
would like to get one to add to stock module in devo 7e with yet A7105 module

is it compatible?

www.ebay.it/itm/Modulo-wireless-2-4Ghz-N...6:g:YNoAAOSwxN5WVxl5

AFAIK it should work, but with very limited range, eg. 30m at an extremely rough guess?
But for a couple of bucks more you can get one with the power amplifier etc for much longer range; just make sure you figure out how you are going to physically mount it before you commit to buying!
with hard-wired antenna mount
more flexible (install), but more expensive

that one "more flexible install" can keep antenna inside devo shell? as per A7105 module?. would be great


my devo with A7105 and 3 way switch

Yep. If you search on banggood for the separate bits (module + antenna) you can get it for a few bucks cheaper.

cant imagine this found on intructable, this small modules are not overseas and 2 euros and no postage delay