Considered the primordal sound from which all other sounds emanate, the Ohm tone is an excellent place to begin for those interested in Sound Healing, and is the chosen tone used by many seasoned Sound Healers. The Mid-Ohm Tuning Fork is 136.10 hz, and being middle range, is widely considered the classic Ohm frequency. The sound vibration of Ohm is relaxing and energizing. Resonating with Ohm can enhance breathing, relieve body tension, assist in meditation and pain management, and help facilitate yoga poses. The sound wave created by the Ohm Tuning fork works like kinetic energy to move disharmony and tension from the body while restoring a sense of well-being. We recommend using 2 Mid Ohm Tuning Forks for working symmetrically and distally on the body, and for doubling the healing resonance when needed. Ohm Tuning Forks can be used on tight muscles, joints, tendons, bones and tissues, as well as, on reflex, trigger and acupuncture points. Made of space grade aluminum, the Ohm Tuning Fork will not go out of tune, and holds the vibration well after being activated. Ohm, also spelled Om, is a specific frequency (136.10 hz) and was known by the ancients to be the most powerful vibration. Package includes Ohm Tuning Fork & Activator, as well as a booklet containing an Overview of Sound Healing, and simple instructions for use. About our Tuning Forks Ohm Therapeutics Tuning Forks are fully guaranteed to stay in tune. We work with the premier tuning fork manufacturer in the US. Ohm Tuning Forks are made with a space & medical grade aluminum alloy and are precision tuned to within 0.5% of their indicated frequency. We have chosen not to color our forks to reduce environmental impact. Both anodizing and painting (which requires an additional degreasing process) are toxic to the environment.