Wooden Box Schumann Wave Generator 7.83Hz with DC 12V 1A Power Adapter Description: Schumann wave itself does not make any sound, it is not directly acting on the sound or video products to improve the quality of sound or vision. It's working on the space environment, make the people's physical and mental get relaxed, improve the body's perception of sound and images, improve the human body health and working efficiency, it also has a good effect on insomnia, mental strain and so on. For more information please Google "Schumann Resonance". For audio-visual space - to enhance the sound field and audio-visual effects For the bedroom - to help sleep soothe the nerves, treatment of insomnia For the office - relax and improve work efficiency For the create space - to improve creative inspiration For the tea ceremony, spirituality, realization space - resting body and mind Parameter: Frequency: 7.83Hz Input voltage: AC 100V-240V Rated voltage: DC 12V Rated current: 1A Size: 150x120x45MM Weight: 1.5KG