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Sekonic RT-GX Godox Transmitter Module

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  • For Speedmaster L-858D-U Light Meter
  • Adds Godox Radio Triggering
  • Frequency: 2.4 GHz
  • Access to 32 Channels and 16 Groups
  • Range: 98.4'
  • HSS Flash Metering Support
  • Adjust Modeling Light Power

The Sekonic RT-GX Godox Transmitter Module is an add-on for the Speedmaster L-858D-U light meter that adds a 2.4 GHz Godox-compatible radio triggering protocol. The Sekonic module can be easily installed into the meter's housing and provides access to 32 channels and up to 16 groups and Wireless IDs for remote triggering within a 98.4' range. Additionally, this radio control allows for adjusting the modeling light power, supports high-speed sync (HSS) flash metering, and makes it easier for Godox users to measure the ambient-to-flash light ratio and flash duration.


In the Box
  • Sekonic RT-GX Godox Transmitter Module
  • Limited 1-Year Warranty with 2-Year Extension upon Online Registration
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More Information
Product ConditonNew
Frequency 2.4 GHz
Channels and Groups 32 Channels, 16 Groups
Range 98.4' / 30 m
Dimensions 1.2 x 0.4 x 1.2" / 3 x 1 x 3 cm
Weight 3.2 oz / 90.7 g

Packaging Info

Package Weight 0.085 lb
Box Dimensions (LxWxH) 3.1 x 2.2 x 1.1"
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to
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