DJI O4 Air Unit Series Review: Feature Analysis & Breakdown
DJI has done it again. On January 9, 2025, they released the DJI O4 Air Unit Series—a hit for first-person view (FPV) drone users.
This video transmission unit promises a blend of ultra-low latency, extended range, and high video quality, designed to cater to both racing enthusiasts and cinematic creators.
There are two products in the series: O4 Air Unit and its Pro counterpart, targeting a broad spectrum of drone users. That’s especially drone pilots prioritizing portability, professional-grade visuals, or immersive FPV experiences.
Key Features of the DJI O4 Air Unit Series
- Flight Performance: Maximum transmission range of 10 km (Air Unit) and 15 km (Air Unit Pro) under FCC standards.
- Latency: Lowest latency of 20 ms (Air Unit) and 15 ms (Air Unit Pro) with DJI Goggles 3 in Racing Mode.
- Video Resolution:
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- Air Unit: Up to 4K/60fps (1/2-inch CMOS sensor).
- Air Unit Pro: Up to 4K/120fps (1/1.3-inch CMOS sensor).
- Field of View (FOV):
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- Air Unit: Standard and wide-angle modes (up to 117.6° FOV).
- Air Unit Pro: Standard, wide, and ultra-wide modes (up to 155° FOV).
- Color and Post-Processing:
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- Air Unit: Normal color mode.
- Air Unit Pro: 10-bit D-Log M color mode for enhanced detail in highlights and shadows.
- Stabilization: Both models support RockSteady 3.0+ and compatibility with Gyroflow for offline post-stabilization.
- Video Transmission Quality: Real-time transmission at 1080p/100fps for both models using H.265 encoding.
- Video Bitrate:
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- Air Unit: Maximum of 100 Mbps.
- Air Unit Pro: Maximum of 130 Mbps.
- Camera Lens: Aperture of f/2.8 aperture, focus from 0.6 m to infinity; Focal length at 14mm for the Air Unit, and 12mm for Pro counterpart.
- Built-in Storage:
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- Air Unit: 23 GB internal storage; no microSD card support.
- Air Unit Pro: 4 GB internal storage; supports microSD cards up to 512 GB.
- Weight:
- Air Unit: 8.2 g (camera module included).
- Air Unit Pro: 32 g (camera module included).
- Dimensions:
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- Air Unit: Transmission module (30 × 30 × 6 mm); camera module (13.44 × 12.36 × 16.50 mm).
- Air Unit Pro: Transmission module (33.5 × 33.5 × 13 mm); camera module (25.55 × 20 × 23.30 mm).
- Operating Temperature: -10° to 40°C for both models.
- Compatibility: Both units are compatible with DJI Goggles 3, DJI Goggles N3, DJI Goggles 2, DJI Goggles Integra, and DJI FPV Remote Controllers 2 and 3.
Special Features:
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- Air Unit Pro: Compatible with DJI Avata 2 ND Filter Set for enhanced exposure control.
- Both models: Support Canvas Mode and Betaflight OSD for customizable on-screen flight data.
Starting Price:
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- Air Unit: $109
- Air Unit Pro: $229
Video Transmission Capabilities
Using H.265 encoding, the O4 Air Unit Series ensures smooth imagery at 1080p/100fps, even during high-speed flights. For context, this bitrate—up to 60 Mbps—provides exceptional clarity and stability.
Related Reading: Drone Videography Guide: UAVs, Processing Software and Editing Techniques
The Pro version gives long range drones a run for their money with its 15 km maximum transmission distance, a significant upgrade over the standard version’s 10 km. Whether you’re flying across rugged landscapes or navigating urban environments, the system’s auto-frequency selection ensures uninterrupted communication. Racing Mode’s ultra-low latency (15 ms) offers a competitive edge.
Imaging: From Casual to Cinematic
The O4 Air Unit and O4 Air Unit Pro cater to different user needs. The standard model, with its 1/2-inch CMOS sensor and 4K/60fps capability, is ideal for hobbyists.
Meanwhile, the Pro model’s 1/1.3-inch sensor, 4K/120fps recording, and 10-bit D-Log M Color Mode are go a long way with creators and advanced users putting together cinematic drone footage.
The 155° ultra-wide FOV of the Pro version allows for expansive shots, capturing more detail and depth. Coupled with RockSteady stabilization and Gyroflow compatibility, the footage remains steady, even during aggressive maneuvers.
Stabilization for Every Scenario
RockSteady 3.0+ and Gyroflow integration offer powerful stabilization options. RockSteady handles in-flight stabilization, ensuring smooth footage without sacrificing frame rate. For post-production, Gyroflow enables precise adjustments, making it an essential tool for filmmakers.
During cinematic videography, this stabilization ensures professional-grade quality. And for drone racing, the footage remains clear and smooth even at high speeds..
What is the Racing Mode, and how does it work?
The newly introduced Racing Mode is designed for competitive FPV pilots, enabling up to eight drones to race simultaneously. It optimizes video transmission latency to as low as 15 ms (Pro) or 20 ms (Standard) while delivering 1080p/100fps real-time visuals. This mode operates in manual channel selection for optimal performance.
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Customizability with Canvas Mode
Canvas Mode and Betaflight OSD support allow you to tailor on-screen flight data to your preference. This feature is particularly valuable for drone racers who rely on real-time telemetry for decision-making.
Customize telemetry displays for improved situational awareness during races, and have more control over your flight data for a personalized experience during freestyle flying.
Compact and Versatile Design
At just 8.2 g, the O4 Air Unit is the lightest video digital transmission solution in its class. This makes it compatible with 2-inch drones and smaller. The Pro version, while heavier at 32 g, includes advanced features that justify its weight.
Lightweight design supports creative builds for miniature drones.
Storage and Accessories
The Pro model supports up to 512 GB of external storage via MicroSD cards. This feature is invaluable for long shoots or intensive sessions. Additionally, the Pro’s compatibility with DJI’s Avata 2 ND Filter Set enables precise control over exposure, ensuring optimal results in bright lighting.
Related Reading: What Are ND Filters and Why You Need Them For Your Drone Camera
Final Thoughts
The DJI O4 Air Unit Series is a versatile addition to DJI’s FPV ecosystem. Whether you’re a seasoned racer, a professional filmmaker, or a drone enthusiast, this lineup has tools for you.
Professionals for cinema-grade quality will lean towards the O4 Air Unit Pro, with its enhanced features and extended range. The standard O4 Air Unit, meanwhile, strikes a balance between affordability and performance, making it an great entry point for hobbyists.
DJI O4 Air Unit Series FAQ
What is the DJI O4 Air Unit Series?
The DJI O4 Air Unit Series is a digital video transmission solution that two models: the standard DJI O4 Air Unit and the enhanced DJI O4 Air Unit Pro, both designed for FPV (First-Person View)
What are the main differences between the O4 Air Unit and O4 Air Unit Pro?
The primary differences lie in image quality, range, and weight. The DJI O4 Air Unit features a 1/2-inch CMOS sensor, supporting 4K/60fps recording, while the Pro version uses a larger 1/1.3-inch CMOS sensor, allowing for 4K/120fps.
The Pro model offers a longer video transmission range of 15 km (compared to 10 km for the standard unit) and includes advanced features like a 155° ultra-wide field of view and 10-bit D-Log M color mode for enhanced post-production flexibility.
How far can the O4 Air Unit transmit video?
The DJI O4 Air Unit offers a maximum video transmission range of 10 km, while the O4 Air Unit Pro extends this to 15 km under FCC standards in open outdoor environments free of interference. Keep in mind that transmission range may vary based on regional regulations, obstacles, and interference.
How does the O4 Air Unit ensure stable video transmission?
Both units utilize DJI’s advanced O4 video transmission system, which features dual antennas and H.265 video encoding. The system supports 1080p/100fps real-time video transmission with a latency as low as 15 ms (Pro) or 20 ms (Standard). This ensures smooth, stable visuals even during high-speed flights.
What stabilization options are available?
The O4 Air Unit Series supports RockSteady 3.0+ for in-flight stabilization, ensuring steady footage during dynamic movements. Additionally, both models are compatible with Gyroflow software for offline post-stabilization, allowing you to refine your footage further in post-production.
What makes the 10-bit D-Log M color mode special?
The 10-bit D-Log M color mode, exclusive to the Pro model, captures a wider range of colors and preserves intricate details in highlights and shadows. This feature provides significant flexibility for post-production editing, making it a valuable tool for cinematic content creators.
What kind of storage options are available?
The DJI O4 Air Unit Pro supports microSD cards up to 512 GB for expanded storage, ideal for lengthy flights or high-resolution recording. The standard O4 Air Unit includes 23 GB of built-in storage but does not support additional microSD cards.
How portable is the O4 Air Unit Series?
The DJI O4 Air Unit weighs approximately 8.2 g, while the Pro version weighs around 32 g, making both models exceptionally lightweight. Their compact design allows compatibility with drones as small as 2 inches, offering flexibility for various creative and racing setups.
Can I use the O4 Air Unit in extreme conditions?
Both units are built to operate in temperatures ranging from -10°C to 40°C. For demanding environments, consider using optional accessories like ND filters to manage exposure and achieve consistent footage.
Are there any usage limitations?
Prolonged recording at high resolutions and frame rates may cause overheating, potentially interrupting recording. To prevent this, ensure adequate ventilation and monitor temperature during use.