Hello all,
Wanted long range 4-5Km transmitter receiver, please suggest.

Also can we upgrade existing Tx/Rx to extend range to 4-5Km

For your kind information, as per DGCA norms neither you could fly beyond 1 km nor you could buy 4-5 km long range TX-RX legally in India.

Thanks for reply. I read about module R9M, crossfire to extend range 5+Km.

So can we buy any 10channel Tx/Rx which compatible to install R9M module?

IS there any Tx/Rx compatible to install R9M module?

Sir,
Most of the Modern Radios, which support "External RF Modules" could support the FrSky R9M Module.
Examples are   FrSky Taranis, Jumper T16, RadioMaster TX16S, Turnigy 9XR Pro, FlySky TH9x, and many more.
If you search for them, and look up in Images, these all, on their backsides, have Bay, to plug/unplug Modules in.

And to your original query, these following modules would get you in the range of 4-5 Kilometers-
- Rmilec NB20          (Way too overpowered for your purpose)
- DragonLink           
- ImmersionRC EzUHF
- MyFlyDream R-Link v2     (The Best LRS for mid-low budget IMO)
- OrangeLRS             ( Very Affordable if you don't mind some playing around the hardware and Flashing.)
- Express LRS           (Very New and mostly optimized for "Long Range FPV Quads")
- FrSky R9M             (Quite popular, hence great community support)
- TBS Crossfire         (Comes as a premium, reliable link out of the Box.)

I am sure there are more, but I hope this answer provides you with enough terms to search/research on web.

Regards,

Great.
Thanks for explanation.