--- product_id: 43058119 title: "Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module" brand: "sekonic" price: "Β£191.66" currency: GBP in_stock: true reviews_count: 4 url: https://www.desertcart.co.uk/products/43058119-sekonic-transmitter-module-rt-el-px-for-l-858d-u store_origin: GB region: United Kingdom --- # Remote power control & flash triggering 20 Lunchroom channels + 4 Phot tix channels Lightweight 0.35 oz with Lithium Ion battery Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module **Brand:** sekonic **Price:** Β£191.66 **Availability:** βœ… In Stock ## Summary > πŸ“‘ Trigger brilliance, control like a pro. ## Quick Answers - **What is this?** Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module by sekonic - **How much does it cost?** Β£191.66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/43058119-sekonic-transmitter-module-rt-el-px-for-l-858d-u) ## 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 - β€’ **Pro-Grade Reliability:** Trusted by pros with a 5-star rating and ranked #243 in photographic light meter accessories. - β€’ **Universal Compatibility:** Works flawlessly with L-858D-U Speedmaster and supports Stratum II protocol for advanced Phot tix receivers. - β€’ **Dynamic Power Adjustment:** Trigger and fine-tune modeling lamp and flash power remotely to nail the perfect exposure every time. - β€’ **Compact & Lightweight Design:** Weighing just 0.35 ounces, it integrates flawlessly without weighing down your gear. - β€’ **Seamless Multi-Channel Control:** Effortlessly manage up to 20 Lunchroom and 4 Phot tix channels for ultimate lighting precision. ## Overview The Sekonic RT-EL/PX transmitter module enhances the L-858D-U Speedmaster light meter by enabling wireless triggering and power control of Lunchroom and Phot tix-enabled lighting systems. Supporting up to 20 Lunchroom channels and 4 Phot tix channels with group selection, it offers precise remote management of flash and modeling lamps. Lightweight and powered by a lithium-ion battery, this module is a must-have for photographers seeking seamless, professional-grade lighting control. ## Description Sekonic RT-EL/PX Transmitter Module is an expansion accessory designed exclusively for the L-858D-U Speedmaster Light Meter, adding integrated wireless flash control for Elinchrom Skyport and Phottix Strato II systems. Once installed, this module enables direct triggering of compatible flashes and remote adjustment of flash power levels from the meter, streamlining studio and location lighting workflows. It also allows control of modeling lamp ON/OFF functions for supported lighting units, enhancing efficiency during setup and exposure testing. Designed for seamless internal integration, the module installs securely within the L-858D-U, maintaining the meterΓ­s compact profile and professional durability. By consolidating metering and wireless flash control into a single device, photographers gain faster adjustments, reduced setup complexity, and improved lighting precision. Ideal for professionals working with compatible Elinchrom and Phottix radio systems, the RT-EL/PX module transforms the L-858D-U into a powerful centralized exposure and flash management tool. Whether balancing multi-light setups or fine-tuning output levels, this transmitter module enhances workflow efficiency and ensures accurate, repeatable lighting control in demanding photographic environments. ## Features - RT-EL/PX for L-858D-U transmitter is compatible with Lunchroom - When working with Lunchroom Triggering and controlling the power level of the light - Radio Channel and groups that can be used with this transmitter module:Lunchroom Channels : 1 to 20 Group : G1 to G4 + ALLPhot tix Channels : 1 to 4Group : A to D ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06XBC2W6T | | Best Sellers Rank | #210 in Photographic Light Meters | | Brand | Sekonic | | Brand Name | Sekonic | | Customer Reviews | 4.3 out of 5 stars 9 Reviews | | Global Trade Identification Number | 04962294011888 | | Included Components | Start-up Guide | | Item Dimensions | 1.3 x 0.47 x 1.1 inches | | Item Type Name | Sekonic corporation 401-626 transmitter module rt-el/px for l-858d-u speedmaster light meter, black. | | Item Weight | 9.98 g | | Item Width | 1.2 Centimeters | | Item dimensions L x W x H | 1.3 x 0.47 x 1.1 inches | | Manufacturer | Sekonic | | Model | 401-626 | | Number of Items | 1 | | Part Number | 401-626 | | Unit Count | 1.0 Count | | Warranty Description | Manufacturer Warranty | ## Product Details - **Brand:** Sekonic - **Global Trade Identification Number:** 04962294011888 - **Item Weight:** 0.02 Pounds - **Item dimensions L x W x H:** 2.2 x 3.07 x 1.02 inches - **Manufacturer:** MacGroup ## Images ![Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module - Image 1](https://m.media-amazon.com/images/I/717R-VQGu1L.jpg) ![Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module - Image 2](https://m.media-amazon.com/images/I/81KiWvB7UyL.jpg) ![Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module - Image 3](https://m.media-amazon.com/images/I/71MZ1J1QZhL.jpg) ![Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module - Image 4](https://m.media-amazon.com/images/I/81eCiiTmOsL.jpg) ![Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter, Elinchrom Skyport & Phottix Strato II Wireless Flash Control Expansion Module - Image 5](https://m.media-amazon.com/images/I/81+DJJY4v4L.jpg) ## Questions & Answers **Q: Does this module fire elinchrom elc pro hd series? the standard module in my l-758dr does not... will this enable it?** A: It will, but only with the L-858 meter. **Q: Does it fire the Flashpoint/Godox system?** A: There is now a Godox/Flashpoint transmitter **Q: Which Phottix would it trigger?odden Strato?all ?!** A: This will fire the Strato, Strato II and the Ares II (channels 1-4). ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***I on December 13, 2025* ### ⭐⭐⭐⭐⭐ Review *by M***T on February 20, 2019* ### ⭐ Review *by M***A on April 26, 2019* ## Frequently Bought Together - Sekonic Transmitter Module RT-EL/PX for L-858D-U Speedmaster Light Meter (401-626) - Lightdow 12 x 12 Inch (30 x 30 cm) White Balance 18% Gray Reference Reflector Grey Card with Carry Bag [Folded Version] - Calibrite ColorChecker Passport Photo 2 (CCPP2) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/43058119-sekonic-transmitter-module-rt-el-px-for-l-858d-u](https://www.desertcart.co.uk/products/43058119-sekonic-transmitter-module-rt-el-px-for-l-858d-u) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-05*