Is new DJI O4 Air Unit Pro compatible with 6s speedybee f405 v4?
I intend to buy DJI Googless 3 and DJI O4 Air Unit Pro and I already have a drone with Speedybee f405 v4.
I read that old DJI O3 Air Unit works fine with this flight controller.
Thank You.

You'll need to see if they have the new frame parts for sale as the camera mount has changed.  

I'm using 04 pros on 2 of those FC's just fine, one hard wired and one using the DJI plug