GoyGentor Frequency Generators US01

GoyGentor Frequency Generators. 7.83Hz Schumann Resonance Generator, Adjustable Sine Wave Frequency Generator for Healing (0.01Hz-299999Hz) with Acrylic Case, USB Powered Signal Generator for Relaxation, Stress Relief & Better Sleep. Resonance Sound Therapy Device for Sleep aid, Meditation, Stress Relief & Yoga.