Sony issues new firmware update for the FA-WRC1M

You can download it here at Sony.

Benefits and Improvements from the latest update

• • Enables the “External Flash Set” function with compatible Interchangeable Lens Cameras
    NOTE: This function is only supported when the wireless radio commander is attached directly to the camera, and cannot be used when shooting off-camera flash with a cable.
    See the the “External Flash Set” function instruction video for more information.

Compatible camera models:

• • ILCE-7RM4 (with firmware version 1.10 or later)
  • ILCE-7RM3 (with firmware version 3.10 or later)
  • ILCE-7M3 (with firmware version 3.10 or later)