I'm going to need a video transmitter in my DJI F550 to communicate with a video receiver on the ground.  Any thoughts on what I should buy?

I'm going to need a flight transmitter on the ground to talk to my drone receiver.  What system should I buy.

Any thoughts on a battery?

NAZA V2 with an F550 -

Thanks,
Robert

I'm going to need a video transmitter in my DJI F550 to communicate with a video receiver on the ground.  Any thoughts on what I should buy?

I'm going to need a flight transmitter on the ground to talk to my drone receiver.  What system should I buy.

Any thoughts on a battery?

NAZA V2 with an F550 -

Thanks,
Robert