Foxeer BOX2 HDMI output resolution/fps

I have a Foxeer Box 4k camera (V1) and the hdmi output resolution is 1080p60.
If I understood correctly, framerate is too high for RPi + HDMI-CSI bridge.

I read somewhere that Box V2 is usable with OpenHD.
Does anyone know what the HDMI resolution/framerate of Box V2 is?