Feature: 1. Made of good quality ABS transparent crystal plastic material, exquiaite and clear 2. Schumann wave does not directly act on speakers or video products to improve sound quality, but on the space environment 3. 7.83Hz cancels the frequency of negative interference produced by electromagnetic waves, makes the reverberation of sound space stable and harmonious, and enables listeners to enjoy more concentrated and pleasant music enjoyment 4. Oftenly used in calligraphy and painting, designers, can help people to calm the mind 5. Can also be used for research in meditation, martial arts, Zhouyi culture research, biology, medicine, etc. Specification: Item Type: 7.83HZ Wave Generator Frequency Modulation (FM): 7.83Hz Product Size(LxWxH): Approx. 135 x 108 x 35mm / 5.3 x 4.3 x 1.4in Rated Current: 1A Accessories: DC 12V power supply General Application: It is recommended that the product be placed at a height of 1.5 meters, and a single product should not exceed 18 square meters in area. If it exceeds, please purchase one more. Classification Application: 1. HIFI application direction Brief Description of HIFI Application Principle: Drive away clutter + purify the listening environment + improve human perception = system improvement A. Application of HIFI Speaker System: In a listening environment of 18 square meters, place the Schumann wave flat in the middle of the two speakers, slightly behind it. If conditions permit, it is recommended to place the Schumann wave at a height of 1.2-1.5 meters. The anti-vibration treatment of the Schumann wave can additionally improve the effect. When the listening environment is larger than 18 square meters, it is recommended to buy two. The Schumann wave can be placed on or next to the cabinet. Other requirements are the same as above. B. HIFI's Amp System Application: Because only earphones are used for listening, in principle, only the "enhancement of human perception" is left, although the effect is drastically reduced, it still exists. 2. AV Film Direction Application: The required number and position of Schumann wave are consistent with HIFI application. For those who use the environment of more than 40 square meters, it is recommended to use four Schumann wave generators. 3. The Direction of Sleep Aid: There are individual differences, some people do not sleep well in the middle of the night when the first application, and after a few days of adaptation, they can achieve deep sleep. 4. Creative Direction: Often used in calligraphy, calligraphy, and designers, able to calm the mind and mind. 5. Other Directions: Research in meditation, martial arts, Zhouyi cultural studies, biology, medicine, etc.. Package List: 1 x 7.83HZ Wave Generator1 x Power Cord1 x User Manual Note: The FM783 Schumann wave generator is an auxiliary device, which acts on the human body with a weaker frequency of auxiliary radiation. The Schumann wave will fail under the following conditions:1. The surrounding environment is too noisy, and various wave types are far greater than the intensity of the Schumann wave generator2. The human body is in a state of excitement3. Various types of continuous DJ music at high volume