Activate your brain by binaural beats meditation according to what you need to do ore perform. this application includes 11 binaural beats frequencies of your selection : * alpha waves - relaxation while awake , pre-sleep and pre-wake. * beta waves - active , busy or anxious thinking , active concentration and cognition. * gamma waves - higher mental activity , perception , problem solving , fear release. * theta waves - dreams , deep meditation , REM sleep. * delta waves - deep dreamless sleep