NOTE: Frequencies have NOT built-in powers but they might have very good balancing/healing effect if you believe so. It is always your believe/believe system the ground for the reflection/manifestation of the outer reality.
DO NOT expose yourself to monotonic sounds for TOO long and DO NOT listen to them while driving or operating machinery. Not recommended while sleeping as well, it might result uncomfortable for your brain. Use very low volume as the most important is "spreading" the frequency and not listening to the tone itself.