The Happymodel OVX300 VTX is an amazing product! It's based on the Open source OpenVTX project by JyeSmith from the EpxressLRS team. Open VTX offers firmware with both SmartAudio and Tramp protocols. On your flight controller, you can use either protocol, and when the VTx powers up, OpenVTx will automatically detect the protocol in use.
• High - power RF output from 25 - 300mW for strong signal transmission.
• Compact size of 15 x 14 mm, making it easy to install.
• Lightweight at only 0.9g, not adding much extra weight to your setup.
Check out our other U.Fl VTXs, as well as the rest of our Happymodel selection!


This Happymodel OVX300 5.8GHz U.Fl VTX is perfect for RC enthusiasts. Whether you're flying drones or other RC aircraft, it provides a reliable wireless video transmission solution. With an input voltage of 5V, it's easy to power. The antenna connector is U.Fl for easy antenna connection. The power/video connection is via solder pads. It's not stack - mounted. Its dimensions are 15 x 14 mm and it weighs 0.9g. Ideal for those looking to enhance their RC flying experience with high - quality wireless video transmission.