obi123 The X and C version have a defogging fan, power button which the older S version doesn't. I think these are the best FPV goggles for the money in terms of performance (better than many rx modules), immage quality (better than FS Dom V3), and build quality - durability (better than FS and Aomway). If these are your 1st FPV goggles, don't think too much. Get the C version for cheaper price. You don't use front camera and 3D (X version) anyway.

obi123 Have you tried to solder the VTX and camera the correct way by putting them on the same ground with you OSD (normally it's the ground next to 5V and camera signal in on your FC), and use at least 10V BEC for VTX. Also, adding a low esr capacitor on the power lead helps a lot with noise problem

obi123 yes of course! Just get the Frsky compatible version then there you go, you can bind it with qx7