HappyModel OVX303 25-300mW 5.8GHz U.Fl VTX w/ OpenVTX

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The Happymodel OVX303 VTX is based on the Open source project OpenVTX powered by Jye Smith from the EpxressLRS team. Open VTX aims to provide firmware with both the SmartAudio and Tramp protocols. Either protocol can be used on the flight controller and on VTx power up the protocol used is automatically detected by OpenVTx.

Check out our other U.Fl VTXs, as well as the rest of our Happymodel selection!


  • Input Voltage: 5V
  • RF Output Power: 25-300mW
  • Antenna Connector: U.Fl
  • Power/Video Connection: Solder Pads
  • Stack Size: 16x16mm, 20x20mm, 25x25mm
  • Dimensions: 15x14mm
  • Weight: 0.9g


  • 1x Happymodel OVX303 25-300mW 5.8GHz U.Fl VTX w/ OpenVTX