Firmware v1.04 for Phottix Mitros+ for Sony and v1.03 for Phottix Mitros flashes is available for download. Both optimize the following:
1. Improved the overheat protection issue of flash head.
2. Improved the battery issue.
PC : Can be upgraded on WinXP/WIN7/Win8
Mac: Cannot be upgraded on Mac OS X 10.9 version “Mavericks”.