chimes

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• 
  Brain waves

  Anti-Stress – alpha 11Hz

  $5.99
• 
  Brain waves

  Boost – beta 20Hz

  $5.99
• 
  Brain waves

  Dreams – delta 4Hz

  $5.99
• 
  Brain waves

  Happiness – alpha 10Hz

  $5.99
• 
  Brain waves

  Regeneration – delta 2Hz

  $5.99
• 
  Brain waves

  Sleep – delta 2.5Hz

  $5.99