4-7hz PURE Theta Binaural Beats. Use headphones! The CIA says 4-7hz is the perfect vibration for accessing hemi-sync.Change your life instantly! This will give you a powerful life changing meditation experience. Lay down, sit down, whatever it takes. Close your eyes. Relax to the deepest. Feel the Power of Frequencies. You can feel it instantly in your brain.You can use these frequencys for sleeping. Accessing hemi sync, CIA says. Lucid dreaming or heal your mind and body while sleeping. Just Enjoy. I love you! Use at your own risk. Don't use it, if you're not mentaly fit. Don't use it, when you drive a vehicle or at work.