---
product_id: 331532454
title: "Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter"
brand: "sekonic"
price: "231043CFA"
currency: XOF
in_stock: true
reviews_count: 4
url: https://www.desertcart.sn/products/331532454-transmitter-module-rt-gx-for-l-858d-u-speedmaster-light
store_origin: SN
region: Senegal
---

# Instant strobe adjustment Wireless control range Seamless device integration Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter

**Brand:** sekonic
**Price:** 231043CFA
**Availability:** ✅ In Stock

## Summary

> 📡 Light control in your hands—master every shot with wireless precision!

## Quick Answers

- **What is this?** Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter by sekonic
- **How much does it cost?** 231043CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/331532454-transmitter-module-rt-gx-for-l-858d-u-speedmaster-light)

## Best For

- sekonic enthusiasts

## Why This Product

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

## Key Features

- • **Built for the Grind:** Rugged, professional-grade construction designed to endure the toughest shoots and environments.
- • **Streamlined Workflow:** Integrate your lighting gear seamlessly—experience a smoother, faster creative process that keeps you ahead.
- • **Tailored Compatibility:** Engineered exclusively for the L-858D-U SPEEDMASTER to guarantee flawless communication and zero lag.
- • **Effortless Wireless Control:** Adjust Flashpoint & Godox strobes remotely from your Sekonic meter—cut setup time, boost on-set efficiency.
- • **Precision Lighting Every Time:** Maintain Sekonic’s signature accuracy for perfectly exposed shots, no retakes needed.

## Overview

The Sekonic RT-GX Transmitter Module transforms your L-858D-U SPEEDMASTER light meter into a wireless command center for Flashpoint and Godox strobes, delivering precise exposure readings and remote strobe control in a durable, professional-grade design.

## Description

SekonicTransmitter Module RT-GX for L-858D-U Speedmaster Light Meter

## Features

- SEAMLESS INTEGRATION - The RT-GX module effortlessly connects your Sekonic L-858D-U SPEEDMASTER light meter with Flashpoint and Godox lighting systems, streamlining your workflow.
- ENHANCED COMPATIBILITY - Specifically designed for the Sekonic L-858D-U SPEEDMASTER, this module ensures flawless communication with your existing equipment for reliable performance.
- WIRELESS CONTROL - Remotely adjust your Flashpoint and Godox strobes directly from your light meter, saving time and increasing efficiency on set with ultimate convenience.
- ACCURATE MEASUREMENTS - Maintain the precision you expect from Sekonic, ensuring every shot is perfectly lit with consistent and dependable exposure readings every time.
- DURABLE DESIGN - Built to withstand the rigors of professional use, its robust construction guarantees long-lasting performance and reliability in demanding environments.

## Images

![Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter - Image 1](https://m.media-amazon.com/images/I/813KUQ6cajS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great price!
*by A***O on March 10, 2024*

This is exactly what I needed. Works perfectly and a fair price… I saved some money from buying brand new! Thanks!

### ⭐⭐⭐⭐⭐ Great module and works seamlessly.
*by R***Z on May 13, 2022*

Works great. Update Sekonic to its latest firmware before using this otherwise it won't recognize the module. That's what happened to me.

### ⭐⭐ Transmitter for Sekonic L-858D-U (MODEL:RT-GX)
*by B***R on March 22, 2025*

Hello, I recently purchased this product for my Sekonic L-858D-U, and when I installed it on my light meter, it didn't work. When I held the transmitter in my hand, I shook it and it made a rattling noise inside. Could the transmitter be faulty? Can anyone give me their opinion on whether they hold the transmitter in their hands and when they shake it, it makes a rattle-like sound? Is this normal? Thank you for your comment.

## Frequently Bought Together

- Sekonic Transmitter Module RT-GX for L-858D-U Speedmaster Light Meter
- Sekonic Speedmaster L-858D-U Light Meter (401-858)

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**Shop now:** [https://www.desertcart.sn/products/331532454-transmitter-module-rt-gx-for-l-858d-u-speedmaster-light](https://www.desertcart.sn/products/331532454-transmitter-module-rt-gx-for-l-858d-u-speedmaster-light)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-10*