Foxeer Cat 3 is a high-end analogue camera designed primarily for working in low light conditions. It has great sensitivity to light while maintaining a low noise level. It is therefore perfectly suited for flying in the dark or at night. To increase the received light, the camera does not have an IR filter, so it is also sensitive to IR light of 850 nm.
The camera has its own OSD and a VSENS pin, thanks to which it can display the supply voltage. This is especially useful for FPV pilots of classic fixed wings who often do not use a flight controller.