Are there inexpensive Bluetooth speakers without on/off sounds?

Question

Bluetooth

Need a speaker that would not make sounds when turned on and off. So that the child does not twitch when, after listening to an audio fairy tale, we turn off the speaker. Judging by the videos, only Marshal has a hardware switch without additional voice acting, but it is a little expensive for audio fairy tales. All JBLs do you-you-tyyysh, maybe there is something, if not silent, then quiet?