The file probably refers to a demo song, rhythm, or recording function. Look at the RockJam manual to identify how to play, stop, or record MP3 files.
Refer to the Ruijie installation guide to understand the device function.
However, since this appears to be a specific audio file or product, here is how to find the proper guide:
Based on typical naming conventions, "RJ433161" suggests a file related to a musical instrument or a Ruijie networking product .