Features 1、Schumann waves themselves do not make any sound or connect to other devices, they can be used by simply plugging in the power. 2、It is not directly applied to audio or video products to improve sound and imagequality, but rather to the spatial environment, providing a specific frequency of electromagnetic waves. 3、Schumann waves 7.83Hz cancels out the negative interference frequency of electromagnetic and radio waves, making the residual sound in the sound space stable and harmonious, allowing listeners to concentrate and enjoymusic more happily, relaxing their body and mind. Specification Used for CreativeSpace for enhancing creatives inspiration. Used in the bedroom to calm the mind and treats insomnia. Used in the office for relaxing and improving work efficiency. Used for audiovisual space for enhancing sound field and audiovisual effects. Used for tea ceremony, spiritual cultivation, and meditation space for calming the mind and body. Features: Schumann waves themselves do not make any sound or connect to other devices, they can be used by simply plugging in the power. It is not directly applied to audio or video products to improve sound and imagequality, but rather to the spatial environment, providing a specific frequency of electromagnetic waves. Schumann waves 7.83Hz cancels out the negative interference frequency of electromagnetic and radio waves, making the residual sound in the sound space stable and harmonious, allowing listeners to concentrate and enjoymusic more happily, relaxing their body and mind. Improving the human body's perception of sound andimages, improving human Exercise, enhancing work and creatives efficiency, and also having certain effects on insomnia, mental stress, etc. Portable size and easy to operate for more convenient using. Specifications: Main color: black Item size: 100 * 90mm / 3.9 * 3.5in Item weight: 78g / 2.8ounce Package size: 100 * 150 * 35mm / 3.9 * 5.9 * 1.4in Package weight: 90g / 3.2ounce Packing List: 1 * Schumann Waves Generator 1 * USB Cable Package List 1 * Schumann Waves Generator 1 * USB Cable