The COBRA SD is the Diversity receiver version of COBRA S, the diversity receiver didnt support the firmware update, thats why there is no type c port on the receiver
Overall I'm happy but..
There is visual glitch, menu text in goggles shakes then every now and then It moves down, it doesn't happen when there is signal from VTX. Hope it's just software issue not some early signs of hardware going bad. And those huge screens are too big, you can't really see corners, there is an option for smaller picture but then it's just tiny. If it comes to picture quality & DVR those are amazing.