Video transmitter

DJI O4 Air Unit

Name: DJI O4 Air Unit
Brand: DJI

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The small, light version for tiny drones: a single-antenna camera and transmitter weighing about eight grams, with less power and range than the Pro.

Specification last checked 2026-07-27

Check this part against a build See all in Video transmitter

Recorded specification

Every value carries the source it was read from. A property with no recorded source is marked as such rather than presented as a fact. If one of them is wrong, tell us: it is the fastest way it gets fixed.

Property	Value	Source
Video system decides fit	DJI O4	Oscar Liangchecked 2026-07-27Quote 1, below the table
Maximum transmit powerCompliance-critical: most countries cap unlicensed 5.8 GHz transmit power, and the cap differs between them.	700 mW	Oscar Liangchecked 2026-07-27Quote 1, below the table
Minimum transmit powerDecides whether a high-power VTX is merely restricted to a setting, or unusable here.	25 mW	Oscar Liangchecked 2026-07-27Quote 1, below the table
Antenna connector decides fit	U.FL / IPEX	Oscar Liangchecked 2026-07-27Quote 1, below the table
Glass-to-glass latencyTime from the scene reaching the camera to it reaching your eye. The number racers choose a system on, and the one thing analog still wins.	20 ms	DJI product specificationschecked 2026-07-27Quote 2, below the table
Onboard recordingThe best resolution the unit itself records, separate from what the goggles' DVR captures. Analog gear records nothing onboard, and that is recorded as its own answer rather than left blank.	4K	DJI product specificationschecked 2026-07-27Quote 3, below the table
Minimum cell count decides fit	2 S	DJI product specificationschecked 2026-07-27Quote 4, below the table
Maximum cell count decides fit	6 S	DJI product specificationschecked 2026-07-27Quote 4, below the table
Carries a cameraA complete drone is not in the camera category but carries one, and a digital air unit is a camera and a transmitter in one part. Many countries trigger registration on the camera regardless of the drone's weight.	Yes	Oscar Liangchecked 2026-07-27Quote 1, below the table
WeightBuild-critical rather than compat-critical: needed to answer registration and class questions.	8.2 g	DJI product specificationschecked 2026-07-27Quote 2, below the table

Oscar Liangchecked 2026-07-27Unlike the dual antenna setup on the O4 Pro, the O4 Lite uses a single dipole antenna connected via a UFL connector; maximum output power of 700mW—limited by the lack of a heatsink; 25mW: 0.98A (4.90W) … 700mW: 1.20A (6.0W); DJI Goggles 3 (Racing Mode): 20ms
DJI product specificationschecked 2026-07-27DJI O4 Air Unit — Weight: Air Unit (camera module excluded): Approx. 5.1 g; Air Unit (camera module included): Approx. 8.2 g*; Antenna: Approx. 0.75 g. * The lens mount is not included. With the lens mount, the weight is 9.2 grams. Lowest Latency: With DJI Goggles 3 and racing mode enabled: With 1080p/100fps video transmission quality, the latency is as low as 20 ms.
DJI product specificationschecked 2026-07-27DJI O4 Air Unit; 4K (4:3): 3840×2880@30/50/60fps; 4K (16:9): 3840×2160@30/50/60fps
DJI product specificationschecked 2026-07-27DJI O4 Air Unit — Input Voltage: 7.4-26.4 V

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What this fits

Checked against every other product in the catalog by the same engine the planner runs, rule by rule. Where a specification is missing the answer is unknown, which is a different answer from compatible.

Frame

Not enough recorded specification (20)

All frame

Not enough recorded specification (20)
The mounting pattern of one of these is not recorded yet.
Rule: Stack mounting pattern
Show the other 8

FPV camera

Does not work with (20)Not enough recorded specification (3)

All fpv camera · All 22 fpv camera checked against this video transmitter

Does not work with (15)
A Analog 5.8 GHz camera cannot feed a DJI O4 transmitter. Digital systems pair a camera and transmitter from the same family.
Rule: Camera matches the video transmitter
Show the other 3
Does not work with (3)
A Walksnail Avatar HD camera cannot feed a DJI O4 transmitter. Digital systems pair a camera and transmitter from the same family.
Rule: Camera matches the video transmitter
Does not work with (2)
A HDZero camera cannot feed a DJI O4 transmitter. Digital systems pair a camera and transmitter from the same family.
Rule: Camera matches the video transmitter
- RunCam HDZero Micro V3
- RunCam HDZero Nano90
Not enough recorded specification (3)
Not enough recorded specification to judge this combination.
Rule: Camera matches the video transmitter

Battery

Does not work with (11)Works with (17)

All battery · All 19 battery checked against this video transmitter

Does not work with (11)
1S is outside the 2–6S range DJI O4 Air Unit accepts.
Rule: Battery voltage within supported range
Works with (8)
6S is inside the DJI O4 Air Unit supported range.
Rule: Battery voltage within supported range
Works with (6)
4S is inside the DJI O4 Air Unit supported range.
Rule: Battery voltage within supported range
Works with (3)
3S is inside the DJI O4 Air Unit supported range.
Rule: Battery voltage within supported range

Goggles

Does not work with (16)Works with (3)Not enough recorded specification (4)

All goggles · All 23 goggles checked against this video transmitter

Does not work with (1)
BetaFPV VR02 Goggles does not receive DJI O4.
Rule: Video system match
- BetaFPV VR02 Goggles
Does not work with (1)
BetaFPV VR03 Goggles does not receive DJI O4.
Rule: Video system match
- BetaFPV VR03 Goggles
Does not work with (1)
BetaFPV VR04 Goggles does not receive DJI O4.
Rule: Video system match
- BetaFPV VR04 Goggles
Does not work with (1)
Eachine EV800D does not receive DJI O4.
Rule: Video system match
- Eachine EV800D
Does not work with (1)
Fat Shark ECHO does not receive DJI O4.
Rule: Video system match
- Fat Shark ECHO
Does not work with (1)
Fat Shark HDO+ does not receive DJI O4.
Rule: Video system match
- Fat Shark HDO+
Does not work with (1)
HDZero BoxPro does not receive DJI O4.
Rule: Video system match
- HDZero BoxPro
Does not work with (1)
HDZero Goggles does not receive DJI O4.
Rule: Video system match
- HDZero Goggles
Does not work with (1)
HDZero Goggles 2 does not receive DJI O4.
Rule: Video system match
- HDZero Goggles 2
Does not work with (1)
Orqa FPV.One Pilot does not receive DJI O4.
Rule: Video system match
- Orqa FPV.One Pilot
Does not work with (1)
Skyzone Cobra SD does not receive DJI O4.
Rule: Video system match
- Skyzone Cobra SD
Does not work with (1)
Skyzone Cobra X does not receive DJI O4.
Rule: Video system match
- Skyzone Cobra X
Does not work with (1)
Skyzone SKY04O Pro does not receive DJI O4.
Rule: Video system match
- Skyzone SKY04O Pro
Does not work with (1)
Skyzone SKY04X Pro does not receive DJI O4.
Rule: Video system match
- Skyzone SKY04X Pro
Does not work with (1)
Walksnail Avatar Goggles L does not receive DJI O4.
Rule: Video system match
- Walksnail Avatar Goggles L
Does not work with (1)
Walksnail Avatar Goggles X does not receive DJI O4.
Rule: Video system match
- Walksnail Avatar Goggles X
Works with (1)
DJI Goggles 3 receives the DJI O4 system.
Rule: Video system match
- DJI Goggles 3
Works with (1)
DJI Goggles Integra receives the DJI O4 system.
Rule: Video system match
- DJI Goggles Integra
Works with (1)
DJI Goggles N3 receives the DJI O4 system.
Rule: Video system match
- DJI Goggles N3
Not enough recorded specification (4)
Not enough recorded specification to judge this combination.
Rule: Video system match
- Caddx Walksnail Ascent 5.8GHz HD
- DirectFPV Fox Pro 1.3/2.4/4.9/5.8GHz 4
- DirectFPV Fox Pro FPV-goggles med
- Hawkeye HD-överföringssystem+HD FPV- headset 1280*720

Antennas

Works, with a compromise (21)Works with (6)

All antennas · All 10 antennas checked against this video transmitter

Works, with a compromise (10)
This antenna is SMA and DJI O4 Air Unit takes U.FL / IPEX. A pigtail adapter is needed, and it adds a little loss.
Rule: Antenna connector match
Works, with a compromise (6)
This antenna is RP-SMA and DJI O4 Air Unit takes U.FL / IPEX. A pigtail adapter is needed, and it adds a little loss.
Rule: Antenna connector match
Works, with a compromise (5)
This antenna is MMCX and DJI O4 Air Unit takes U.FL / IPEX. A pigtail adapter is needed, and it adds a little loss.
Rule: Antenna connector match
Works with (6)
Both use U.FL / IPEX.
Rule: Antenna connector match

The standards this part is judged by

What the properties above actually mean, which differences are absolute, and where the names used in shops mislead.