DJI O4 Air Unit
The O4 Air Unit steps through 25 / 50 / 100 / 200 / 400 / 700 mW, which is 14 / 17 / 20 / 23 / 26 / 28 dBm: the top level is 14 dB above the lowest, about 5.3x the free-space range on the same antennas.
| System | DJI |
|---|---|
| Max power | 700 mW |
| Power levels | 25 / 50 / 100 / 200 / 400 / 700 mW |
| Frequency range | 5.170-5.250 / 5.725-5.850 GHz |
| Band | 5.8 GHz |
| Mounting | 25.5x25.5mm |
| Weight | 5.1 g (camera excluded) |
| Price (approx.) | 139.99 USD |
Choosing between systems? See analog vs DJI vs Walksnail vs HDZero.
Where this data comes from
max_power_mw and power_levels_mw are DJI's own figures from the O4 Air Unit Series user manual v1.0 (section 4.3 Setting Transmission Power, p17): 'DJI O4 Air Unit: The maximum available transmission power levels are 25mW, 50mW, 100mW, 200mW, 400mW, and 700mW.' These are output-power levels in milliwatts, the same quantity the analog listings in this column print, and NOT the Transmitter Power (EIRP) dBm figures DJI publishes elsewhere - EIRP includes antenna gain and is a different measurement. Available levels are lower in regions whose regulations cap them (DJI states this in the same block). weight_g is 5.1 g, the camera-excluded figure (owner ruling 2026-10-20: a kit's weight is the transmitter's, the camera being its own class here). DJI's own O4 Air Unit specification table (DJI's spec-page export, hosted by a UK dealer, read 2026-10-20) prints 'Air Unit (camera module excluded): Approx. 5.1 g', 'Air Unit (camera module included): Approx. 8.2 g*', 'Antenna: Approx. 0.75 g' and the footnote '*The lens mount is not included. With the lens mount, the weight is 9.2 grams.' - the listing's figures exactly.
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