Set of 5 Brain Tuned Healing ChimesThis listing comes with 5 tuned chimes, hanger, and mallet. This Set of 5 Brain Chimes are tuned according to EEG studies of brainwave activity. Various states of brain activity are called Delta, Theta, Alpha and Beta. Each of the tubes, when played with the fundamental brain pipe, creates a binaural beat equal to each of the brainwave states. These chimes are made from heat treated aluminum pipes and are hand tuned, creating clean tones with long