Overview The DJI O4 Air Unit Series is equipped with the DJI O4 video transmission system, achieving ultra-low latency for more responsive controls. Paired with the dual-antenna design of the DJI O4 Air Unit Pro, the max transmission distance can reach up to 15 kilometers, [2] and the system can automatically select the most stable frequency. Whether … Continue reading DJI O4 & O4 Pro FPV Air Units