Barabesty OM136.1Hz Aluminum Musical Tuning Fork Instrument Kit for Sound Sound Vibration

corresponding is the heart . vibration frequency and location of the heart , two points and dovetail points of the vibration frequency of the same, after knocking vibration when used in with the heart location, you can feel the resonance. Convenient to use. in use. Low frequency tuning fork. tuning fork frequency. For use in decline, weak, uneasy, or the need to stress, reduce , also for conducting careful , or yoga use.