DJI O4 Air Unit Pro
The O4 Air Unit Pro steps through 25 / 50 / 100 / 200 / 400 / 700 / 1200 mW, which is 14 / 17 / 20 / 23 / 26 / 28 / 31 dBm: the top level is 17 dB above the lowest, about 6.9x the free-space range on the same antennas.
| System | DJI |
|---|---|
| Max power | 1200 mW |
| Power levels | 25 / 50 / 100 / 200 / 400 / 700 / 1200 mW |
| Frequency range | 5.170-5.250 / 5.725-5.850 GHz |
| Band | 5.8 GHz |
| Mounting | 20x20mm / 25.5x25.5mm |
| Weight | 15.6 g (camera excluded) |
| Price (approx.) | 289.0 USD |
Choosing between systems? See analog vs DJI vs Walksnail vs HDZero.
Where this data comes from
max_power_mw and power_levels_mw from DJI's O4 Air Unit Series user manual v1.0 (section 4.3, p17): 'DJI O4 Air Unit Pro: The maximum available transmission power levels are 25mW, 50mW, 100mW, 200mW, 400mW, 700mW, and 1200mW.' The same page adds that above 700mW the unit trims itself between the set value and 700mW based on the flight environment, so 1200 mW is the ceiling, not a sustained figure. Output power in milliwatts, not EIRP. mount_mm is the listing's own 'VTX Mounting Pattern: 20x20/25.5x25.5mm' line, which the scraper now reads in place of the '33.5x13mm' it used to take from 'Dimensions: 33.5 x 33.5 x 13 mm (L x W x H)'. weight_g is 15.6 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 Pro specification table (DJI's spec-page export, hosted by a UK dealer, read 2026-10-20) prints 'Air Unit (camera module excluded): Approx. 15.6 g', 'Air Unit (camera module included): Approx. 32 g' and 'Antenna: Approx. 2.1 g/pcs' - the listing's figures exactly. 15.6 g is also what the transmission-module SKU publishes.
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