I dont want to make a advertisment, but i bet ,this is exact copy of LP5
https://www.youtube.com/watch?v=yKxRQsrvDLo
https://www.youtube.com/watch?v=yKxRQsrvDLo
Like i said the video shows a different device or you made it wrong somewhere. The LP5 audio is not tick-tick 555 timer like audio but a very pleasant tone audio around 1khz if i remember correct.
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