Happymodel OVX306 Tinywhoop FPV VTX – 5.8GHz 48CH OpenVTX with SmartAudio, 25/100/400mW Switchable Output, Nano Size VTX Compatible with Whoop_VTX/HP, Preloaded Firmware

Price: GBP26.99
(as of Jun 07, 2026 06:04:27 UTC – Details)

Product description

Happymodel OVX306 VTX are based on the Open source project OpenVTX powered by JyeSmith (EpxressLRS team)The size of the OVX306 tx module is the same size as whoop_vtx and whoop_vtx_hp, and the interface are also exactly the same, which can completely replace whoop_vtx and whoop_vtx_hp.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.Currently SA is fully implemented and test against Rev. 09. To date IMRC has not released a protocol standard and implementation is based on information found within Betaflight.

Main Features

OpenVTX firmware preloadSmartaudio readyNano size and stable power output

OVX306 Specifications

Model: OVX306Frequency: 5.8G 48CHTransmitting Power: 0/RCE/25mw/100mw/400mwPower supply: DC 5VCurrent (5v): <650ma (400mw)Weight: 1.5gram without antennaCenter distance of mounting holes:25.5mmx25.5mm

📡 SmartAudio & Tramp Protocol Support 📡 Preloaded with OpenVTX firmware, the OVX306 supports both SmartAudio and Tramp protocols, offering flexible integration with most modern flight controllers. It auto-detects the correct protocol on startup for seamless plug-and-play setup.
🛠️ Drop-In Replacement for Whoop_VTX 🛠️ Designed with the exact same form factor and interface as the original Whoop_VTX and Whoop_VTX_HP modules, this unit serves as a direct replacement—no need to modify your existing build.
🔋 Stable Power with Adjustable Output 🔋 Supports 0/RCE/25mW/100mW/400mW power levels, ensuring reliable signal transmission for indoor and outdoor flying. Power-efficient design draws less than 650mA at max output on 5V input.
📏 Ultra-Light Nano Size for Micro Builds 📏 Weighing only 1.5g without antenna, the OVX306 is ideal for 65mm–85mm whoop builds and other lightweight racing drones where every gram counts. Built for speed without compromising stability.
🌐 Open Source & Community-Supported 🌐 Part of the open-source OpenVTX project, developed with support from the ExpressLRS team, it offers transparency, regular updates, and community-driven innovation. Join the dev community via GitHub or Discord.

Product summary

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