I am about to purchase an FPV setup.  I have a Flamewheel with Naza GPS.  My plan is to use my Gopro with a 5.8 Immersion 600mw tx, and a Duo5800V2 Rx.  I wouldn't use the built in 5.8 receiver in the headset, but how could I use it without cables hanging down?
Also, what is the battery...