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4![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
Brain Focus Exercises, 4 Hz Sound
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6![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
Theta Brainwave Frequency (4 Hz)
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8![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
Theta Waves ADHD, 5 Hz for Studying
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12![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
Deep Meditative State (8 Hz Tone)
13![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
Brain Healing Frequencies (10 Hz)
14![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
10 Hz Music (Alpha Waves Music)
15![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
12 Hz Frequency, Alpha Waves Meditation