The Mid-Ohm Tuning Fork is 136.10 Hz frequency, and in 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. Two Mid-Ohm Tuning Forks can be used together to produce a wonderful Ohm resonance, and to double the healing power when placed on the body (also see Mid Ohm Set & Mid Ohm Kit)