David & Steve Gordon, Binaural Beats Research, Binaural Beats Research, David & Steve Gordon - Effortless Self Control - 41.2 Hz Gamma Frequency Binaural Beats

Effortless Self Control - 41.2 Hz Gamma Frequency Binaural Beats
David & Steve Gordon, Binaural Beats Research, Binaural Beats Research, David & Steve Gordon
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