Thank you for posting and welcome to the community. I would be happy to help with this.
Just to double-check, are you trying to rename your Home Speaker 300?
If so this can be done using the Bose Music app. You would want to select the speaker you want to rename, then navigate to Settings > Technical Info > Product Name. From here you will be able to choose a new name for your speaker.
I hope this helps.
Let me know if you have any further questions.
Keith L - Community Support
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