The Schumann waves generator itself does not make any sound, and it is not directly acting on the sound or video products to improve the quality of sound or vision, but it plays a role in the space environment, it can help relax people's physical and mental, and it helps improve the body's perception of sound and imaging, and it also helps the human body more healthier to improve the work efficiency, and the condition of mental stress also has improved. Features: This product is a 7.83 Hz low frequency Schumann waves generator featuring high accuracy and stability. Schumann electromagnetic waves are low frequency and can penetrate any material. Each individual has a network of weak currents that will produce frequency resonances when excited by Schumann waves. The overall equilibrium of the human meridians is maintained by receiving the Schumann electromagnetic field and the cellular frequency resonance of the human body to reduce the damage caused to the human body by the EMF ionizing radiation. Human frequency resonances can be induced, complementing natural geomagnetic and artificially attenuated electromagnetic field (EMF) interference, and equilibrating the membrane potential health. Designed to enhance creation inspiration, relaxation and productivity, the space is designed to create space, enhance inspiration, and be used for tea ceremonies to rest the mind and body. Commonly used in daily life, it can be applied to sleep, and it also has a mild effect on insomnia. You can use it in the audio-visual space to enhance the sound field and audio-visual effects. You can apply it in the bedroom to improve the quality of your sleep and soothe your nerves and regulate your sleeplessness, and you can use it in the office to improve your productivity. In addition, it can help remove odors and smoke, making the air fresher. Built-in rechargeable polymer lithium battery, with overcharge, over-discharge and over current protections, with more accurate output frequency. The working light can be turned on or off according to your preference. Specifications: Name: Schumann Generator Material: printed circuit board Battery: 1 * 3.7V, 850mAh built-in battery (included) Item size: 68 * 52 * 12mm / 2.68 * 2.05 * 0.47in Package size: 150 * 111 * 15mm / 5.91 * 4.37 * 0.59in Package weight: 69g / 2.43ounce Packing List: 1 * Schumann Generator 1 * USB Cable