---
product_id: 598123856
title: "HAPPYMODEL OVX303 5-8G 40CH 300/5V Current VTX OpenVTX for Indoor Drone"
brand: "happymodel"
price: "¥12513"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/598123856-happymodel-ovx303-5-8g-40ch-300-5v-current-vtx-openvtx
store_origin: JP
region: Japan
---

# 300mW max transmission power 40CH multi-channel versatility Stable 5V power supply HAPPYMODEL OVX303 5-8G 40CH 300/5V Current VTX OpenVTX for Indoor Drone

**Brand:** happymodel
**Price:** ¥12513
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your indoor drone game with power, precision, and pro-level control!

## Quick Answers

- **What is this?** HAPPYMODEL OVX303 5-8G 40CH 300/5V Current VTX OpenVTX for Indoor Drone by happymodel
- **How much does it cost?** ¥12513 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/598123856-happymodel-ovx303-5-8g-40ch-300-5v-current-vtx-openvtx)

## Best For

- happymodel enthusiasts

## Why This Product

- Trusted happymodel brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Future-Ready Firmware:** OpenVTx firmware preloaded with cutting-edge features for smooth, reliable video transmission
- • **Plug & Play Stability:** Stable 5V power supply with low current draw (<650mA) keeps your drone flying longer
- • **Power That Packs a Punch:** Adjustable transmission power up to 300mW ensures crystal-clear video up to 300 meters
- • **Nano Size, Mega Performance:** Compact design fits multiple mounting hole sizes (16-25.5mm) for versatile drone builds
- • **Seamless Protocol Compatibility:** SmartAudio & Tramp auto-detection for effortless control integration

## Overview

The HAPPYMODEL OVX303 is a compact, high-performance 5.8GHz video transmitter designed for indoor drones. Featuring 40 channels and up to 300mW transmission power, it supports both SmartAudio and Tramp protocols with automatic detection for seamless integration. Its nano size fits multiple mounting hole standards, powered by a stable 5V supply with low current consumption, making it an ideal choice for professional-grade indoor FPV flying.

## Description

HAPPYMODEL OVX303 5-8G 40CH 300/5V Current VTX OpenVTX for Indoor Drone

## Features

- 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.
- OpenVTX firmware preload, Smartaudio ready, Nano size and stable power output.
- Transmitting Power: 0/RCE/25/100/300; Power supply: DC 5V ; Current (5v): <650ma (300) .
- Center distance of OVX303 Mounting Holes: 16mmx16mm, 20mmx20mm, 25.5mmx25.5mm.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | HAPPYMODEL |
| Model Name | OVX303 |
| Age Range (Description) | Baby |
| Color | Black |
| Connectivity Technology | SmartAudio and Tramp protocols |
| Included Components | Control Stick, Remote Control |
| Video Capture Format | MP4 |
| Control Type | Remote Control |
| Maximum Range | 300 Meters |
| Material | Plastic |
| Wireless Communication Technology | 5.8 GHz, SmartAudio, Tramp |
| Are Batteries Included | No |
| Supported Image Format | DNG, JPEG, RAW |
| Remote Control Included? | No |
| Optical Sensor Technology | CMOS |
| Rechargeable Battery Included | No |
| Manufacturer | HAPPYMODEL |
| Item Weight | 0.317 ounces |
| Package Dimensions | 3.74 x 2.24 x 0.67 inches |
| Item model number | Z44546-E2 |
| Manufacturer Part Number | Z44546-E2 |
| Lift Type | Manual |

## Product Details

- **Brand:** HAPPYMODEL
- **Model Name:** OVX303
- **Age Range (Description):** Baby
- **Color:** Black
- **Connectivity Technology:** SmartAudio and Tramp protocols
- **Included Components:** Control Stick, Remote Control
- **Video Capture Format:** MP4
- **Control Type:** Remote Control
- **Maximum Range:** 300 Meters
- **Material:** Plastic

## Images

![HAPPYMODEL OVX303 5-8G 40CH 300/5V Current VTX OpenVTX for Indoor Drone - Image 1](https://m.media-amazon.com/images/I/51oPyBiDa2L.jpg)

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**Shop now:** [https://www.desertcart.jp/products/598123856-happymodel-ovx303-5-8g-40ch-300-5v-current-vtx-openvtx](https://www.desertcart.jp/products/598123856-happymodel-ovx303-5-8g-40ch-300-5v-current-vtx-openvtx)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-24*