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Happymodel OpenVTX OVX303 5.8G Nano Size VTX

Happymodel OVX303 5.8G 40ch VTX OpenVTX

Happymodel OVX300 and OVX303 VTX are based on the Open source project OpenVTX powered by JyeSmith (EpxressLRS team)

OpenVTx 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.


Main Features

OpenVTX firmware preload

Smartaudio ready

Nano size and stable power output



OVX303 Specifications

Model: OVX303

Frequency: 5.8G 40CH

Transmitting Power: 0/RCE/25mw/100mw/300mw

Power supply: DC5V

Current (5v): <650ma (300mw)

Weight: 1.5gram without antenna

Center distance of mounting holes:

16mmx16mm

20mmx20mm

25.5mmx25.5mm


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