Really not sure what else to call it, (RF?) interference filter board that connects between the gimbal and wifi module. What exactly does it do? Any links to more detailed description. My google foo, is not working well for this item... Having read other post related the H3 gimbal, issues related to not having installed and the after effects thereafter. I was wondering if this could be another source for loss/reduction of FPV transmission. Don't want to overlook what appears to be such a simple item in the FPV link. Sort of like how DJI heat sinked the wifi module, not very well...for such a simple procedure.