Martin Neither the battery voltage (2S or 3S) nor the C rating have any influence on the range or power output. The VTx steps down the battery voltage internally and the current draw is low anyway.

Martin The VTx or camera don't have an internal OSD. You will have to use an external OSD like Minim or use your flight controller if it has an onboard OSD chip.

Martin Power input has a male JST RCY connector (with pins). This has nothing to do with the antenna connector (RP-SMA female, also with a pin).

Martin According to the table there is only a V2 version of the X model. It used to have a RapidMix receiver but now has an ordinary diversity receiver set. Had the opportunity to purchase the original X version for just 140 € last year (in gray). The only advantage of the V2 seems to be its ability to record H264 at 60fps.

Martin Yes, it is. The module will fit any radio with a JR bay or an adapter.

Martin As most all whoops have the same mounting hole pattern for flight controller and canopy, it should fit the UZ65 too.

Martin Both systems work with two separate video receivers, not just one receiver with two antennas (so called "antenna diversity"). (True) Diversity decides for the better signal to show on your screen while Rapidmix (aka Rapidfire or Fusion) merges the two signals to something better than the individual ones. This mix works nicely and is recommended.

Martin Mine did, so yes.