405 Hz can help from a spiritual point of view to develop more wisdom and improve general well-being. It can also help to gain more knowledge and also have a positive effect on the chakra system as well as the third eye.
When listening to frequencies, you should always drink enough water! The frequencies can be listened with speakers as well as with earphones.
Important Disclaimer: Frequencies should not replace medical treatment!
My Youtube Channel: https://www.youtube.com/@frequencymind
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