wave itself does not emit any sound, nor connected to other equipment, only plugged in can be used, not directly on the audio or video products to improve the sound quality of the picture, but the role of the space environment, providing a specific frequency of electromagnetic waves this electromagnetic wave frequency was first discovered by the American scientists , the frequency of this electromagnetic wave and the size of the Earth, a variety of living creatures live in this electromagnetic wave for a long time, and organisms have been living in this electromagnetic wave for a long time and have been reproducing for . .83Hz offset electromagnetic wave radio wave negative interference frequency, so that the acoustic space reverberation stable and harmonious, so that listeners can be more concentrated and happy to enjoy the music let people's body and mind relaxation, improve the body's perception of sound and image, improve the health of the human body to improve the efficiency of work creation, insomnia, mental tension, etc. also has a certain effect Colour:As Shown Material:ABS Package Contents: 1 x Schumanto generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.