http://ow.ly/4aNgS Brain entrainment works by delivering sounds though head phones, and gently and very safely suggesting to your brain to lower the frequency to similar to that achieved after years of strict meditation practice. There are no hocus pocus, hypnosis, or any other malicious activity involved. You will just simply learn a better control of your brain waves, emotions, and your state of mind. This truly is training your brain like a muscle.