The Otto tuners are used for relaxation, as the sound vibrates into the bones and releases tension.
The Otto Tuners are tuned to the frequencies of 32cps, 64cps and 128cps.
They vibrate at a low pitch and due to their weighted ends, the sou...
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I had originally bought a cheaper set. The vibration didn't last very long at all so I returned them and bought the Otto brand. They are amazing!