Use the Ohm Tuning Forks on bones, tissue, acupressure and reflex points for a healing and relaxing experience. Use the forks while stretching or doing yoga to help enhance and deepen your pose. Because the Ohm tone is calming and grounding, the Ohm Tuning Forks are also suitable tools to use while meditating. The Ohm Octave is a beautiful and healing musical interval, connecting us with the Earth, and furthering our understanding of Ohm. When these two different tones (or tuning forks) are sounded together, they create the beautiful and healing musical interval of an Ohm Octave. Set Consists of the Mid-Ohm (136.1 Hz) and the Low-Ohm (68.05 Hz) Tuning Forks, Activator, overview of Sound Healing, plus information about Octaves, Overtones and an Instructional Booklet.