Concentrated & Focused Mind - 12.2 Hz Beta Frequency Binaural Beats

歌曲	Concentrated & Focused Mind - 12.2 Hz Beta Frequency Binaural Beats
歌手	Binaural Beats Research
专辑	Over 3 Hours of Beta Waves Total Focus & Concentration Binaural Beats & Isochronic Tones Music & Nature Sounds