DJI O4 Air Unit Pro Transmission Module
The O4 Air Unit Pro Transmission Module 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 |
| Price (approx.) | 169.0 USD |
Choosing between systems? See analog vs DJI vs Walksnail vs HDZero.
Where this data comes from
This SKU is the O4 Air Unit Pro's video transmission module sold without the camera - the retail listing gives 'Compatibility: DJI O4 Air Unit Pro' and sells it for repair and replacement - so it is the same radio as the kit and carries the kit's figures from DJI's O4 Air Unit Series user manual v1.0 (section 4.3, p17). Output power in milliwatts, not EIRP. mount_mm is the kit listing's 'VTX Mounting Pattern: 20x20/25.5x25.5mm' line: this SKU is that kit's transmission module, so it is the same board with the same holes, and its own listing states no pattern at all. What it used to hold was '33.5x13mm', two of the three figures the same listing prints as 'Dimensions: 33.5 x 33.5 x 13 mm (L x W x H)'. frequency_range is the same manual's section 4.4 (p17), which covers the whole O4 Air Unit series: in Auto mode the unit 'will automatically select the channel with optimal signal strength between 5.170GHz and 5.250GHz or between 5.725GHz and 5.850GHz' - the span the kit's page already prints.