Happymodel OVX300 25-300mW 5.8GHz U.Fl
Listed as: Happymodel OVX300 25-300mW 5.8GHz U.Fl w/ OpenVTX
Of the 81 other 5.8 GHz analog video transmitters in our database, 9 have a lower maximum power than the OVX300 25-300mW 5.8GHz U.Fl (300 mW, 25 dBm), 1 the same and 71 a higher one; the class median is 800 mW.
| System | analog |
|---|---|
| Max power | 300 mW |
| Power levels | 0 / 25 / 100 / 300 mW |
| Frequency range | 5.8 GHz |
| Input voltage | 5V |
| Power draw | under 650 mA at 5 V (300 mW output) |
| Channels | 40 |
| Antenna connector | U.FL |
| Weight | 0.9 g |
| Price (approx.) | 33.99 USD |
Choosing between systems? See analog vs DJI vs Walksnail vs HDZero.
Where this data comes from
Happymodel's own post for the OVX300 and OVX303 prints the block: Model: OVX300, Frequency: 5.8G 40CH, Transmitting Power: 0/RCE/25mw/100mw/300mw, Power supply: DC 5V, Current (5v): <650ma (300mw), Weight: 0.9gram without antenna, Standard size: 14*15*3mm. It confirms the two figures this page already carried off the retail listing (300 mW, 0.9 g) and adds the channel count, the input voltage and the power steps. 14*15*3mm is the board, not a pattern: the OVX300 states no mounting holes at all - that is the OVX303's half of the same post - so mount_mm stays empty. power_levels_mw keeps the steps stated in milliwatts; the list also carries a step labelled 'RCE' between 0 and 25 whose power is never given a figure. The Betaflight vtxtable pasted under the blocks is not a source for this column: its powerlabels read '0 RCE 25 100 400' on a page whose two spec blocks both say 300, so it is the OVX306's table. power_draw is the maker's own supply figure, 'Current (5v): <650ma (300mw)' in the OVX300 block, read 2026-10-17; it is the VTX's input draw, not its RF output.