The file is most likely a firmware update package for FlySky radio transmitters . Specifically, it has been identified as firmware for the Go to product viewer dialog for this item. model. File Details
To apply this update, you generally use the software. Download the .rar file and extract the firmware. Download 1042 rar
: .rar (a compressed archive file). You will need a program like 7-Zip or WinRAR to open and extract the contents. Usage Instructions The file is most likely a firmware update