Powered by Mini Usb port, typical +5V@0.1A, send USB cable. ultra-low static power consumption main control IC, the waveform is more stable. Output 7.83HZ pulse square wave with a duty ratio of 50%, and the frequency can be fine-tuned and corrected Using high-quality materials, the quality is guaranteed. Exquisite appearance Schumann waves are extremely low-frequency electromagnetic waves that can penetrate any substance and are non-ionizing radiation. And everyone has a weak potential network, excited by Schumann waves, it will produce frequency resonance, and the strength of its resonance is related to the internal structure of the electrical network (human body). Some people have a better electrical network structure and can easily receive Schumann waves; some people can only receive weak Schumann waves, which is similar to the frequency tuning of a radio. Schumann wave is a natural energy source, which is inexhaustible. Anyone who is easy to resonate with Schumann wave is often , naturally full of energy and healthy. Through the received Schumann wave electromagnetic field and the cell frequency resonance of the human body, the overall balance of the human body's meridians is maintained, thereby reducing the damage caused by EMF ionizing radiation to the human body. When simulating the natural regenerated geomagnetic field by electronic methods, such as using a square wave generator to generate an artificial 7.83Hz Schumann wave frequency instead of the natural Schumann wave. It can induce the frequency resonance of the human body, supplement the natural geomagnetism and artificially weaken the EMF interference of the electromagnetic field, and make the cell membrane potential balance and healthy. Colour:black+silver Material:PCB+Metal Package Contents: 1 x Schumann Wave Generator 1 x USB cable 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.