DJI O4 Air Unit Pro for FPV Drone, Digital Transmission System, 15ms Low Latency, 15km Max Range, 4K/120fps Video Recording, 1080p/100fps Live View, 155° FOV, 1/1.3-inch CMOS Sensor

The DJI O4 Air Unit Pro is a digital video transmission system and camera module designed for custom FPV drone builds. It provides real-time high-definition video feeds to compatible goggles while recording high-resolution flight footage directly. This system suits custom drone builders and video creators who want high-frame-rate recording alongside low-latency live feeds.

At the core of the imaging system is an upgraded 1/1.3-inch CMOS sensor paired with an ultra-wide 155° field of view. The unit records video at up to 4K resolution at 120 frames per second, providing detailed footage and strong flexibility during post-production editing. For real-time flight navigation, the system transmits an H.265 video feed at 1080p resolution and 100 frames per second. This high-definition live view helps pilots track their flight path clearly and make precise control inputs during rapid maneuvers.

Signal performance is supported by a maximum video transmission range of up to 15 km, giving pilots generous range for exploring wide areas. The transmission system achieves latency as low as 15 ms, delivering quick responsiveness between pilot control commands and visual feedback in the goggles. Additionally, the overall assembly is lightweight and compact, which makes it easier to mount into DIY frames without cluttering up custom flight builds.

Hardware compatibility requires attention before building. The unit must be paired with specific control gear, such as pairing DJI Goggles N3 or Goggles 3 with the DJI FPV Remote Controller 3, or pairing DJI Goggles 2 or Goggles Integra with the DJI FPV Remote Controller 2. Furthermore, the listing does not state exact physical measurements, mounting hole patterns, or weight in grams, so custom builders will need to verify frame clearance during assembly.

Verdict: The DJI O4 Air Unit Pro is an ideal choice for FPV pilots building custom drones who need high-definition 4K/120fps recording and reliable live video feeds. It is best suited for builders using supported DJI goggles and remote controllers who want long transmission range and low-latency flight controls.

• Sensor: 1/1.3-inch CMOS
• Video Recording: 4K at 120fps
• Live View Transmission: 1080p at 100fps (H.265)
• Field of View: 155° ultra-wide FOV
• Minimum Latency: 15ms
• Maximum Transmission Range: Up to 15 km
• Filter Compatibility: DJI Avata 2 ND Filters Set (ND8/16/32)
• Goggles Compatibility: DJI Goggles N3, Goggles 3, Goggles 2, Goggles Integra
• Controller Compatibility: DJI FPV Remote Controller 3, DJI FPV Remote Controller 2

A great fit if you:

• Build custom FPV drones and require high-resolution 4K/120fps video recording with a wide 155° field of view.
• Already own or plan to use compatible hardware such as DJI Goggles 3 with the DJI FPV Remote Controller 3.
• Need long-range flight capability with up to 15km max transmission distance and low 15ms video latency.

Consider something else if you:

• Use legacy or non-listed goggle and remote controller combinations that fall outside the supported hardware pairings.
• Prefer pre-assembled ready-to-fly drones rather than installing individual air units onto DIY drone builds.

Confirm on the listing:

• Check which specific DJI goggles and remote controller you plan to use to ensure proper system pairing.
• Verify the mounting space and physical clearance inside your custom drone frame to accommodate the unit.
• Confirm what mounting hardware, antennas, or connecting cables are included in the package.
• Check whether you need the optional DJI Avata 2 ND Filters Set (ND8/16/32) for outdoor lighting conditions.

How to compare your options: Focus on core transmission specs including maximum range, latency, live video resolution, and onboard recording quality. If high-frame-rate 4K recording and low 15ms latency are essential for your builds, compare how the listed 1/1.3-inch CMOS sensor and H.265 transmission line up with your project goals. Always double check component compatibility across goggles and transmitters before finalizing your build selection.

Carefully plan the placement of the air unit inside your custom frame prior to installation, leaving adequate room for mounting and cable connections.

Ensure your control setup matches the manufacturer pairing guidelines, combining DJI Goggles N3 or Goggles 3 with the DJI FPV Remote Controller 3, or DJI Goggles 2 or Integra with the DJI FPV Remote Controller 2.

If flying in bright lighting conditions, consider using the compatible DJI Avata 2 ND Filters Set (ND8, ND16, or ND32) on the camera lens to help manage exposure during 4K/120fps recording.

Inspect the camera lens and unit housing regularly for dust or debris after flights, cleaning surfaces gently as recommended in standard equipment manuals.

Which goggles are compatible with the DJI O4 Air Unit Pro?
The unit is compatible with DJI Goggles N3, DJI Goggles 3, DJI Goggles 2, and DJI Goggles Integra when paired with the corresponding DJI remote controller.

Which remote controllers work with this air unit?
It supports the DJI FPV Remote Controller 3 when paired with Goggles N3 or Goggles 3, and the DJI FPV Remote Controller 2 when paired with Goggles 2 or Goggles Integra.

What is the maximum recording resolution and frame rate?
The camera records video at up to 4K resolution at 120 frames per second, utilizing a 1/1.3-inch CMOS sensor with a 155° ultra-wide FOV.

What neutral density filters fit this camera?
The unit is compatible with the DJI Avata 2 ND Filters Set, which includes ND8, ND16, and ND32 filters.

What is the exact weight and dimensions of the unit?
The listing describes the unit as lightweight and compact for easy DIY integration, but it does not specify exact weight in grams or numerical dimensions. Check the full manufacturer spec sheet for precise measurements.