Feature: 1. [Ultra Low Frequency] Schumann wave electromagnetic wave is ultra low frequency, can penetrate any material, is non free radiation. People who are prone to resonance with Schumann waves are like frequently recharging, promoting mental fullness and physical health. 2. [Working Principle] Each person is a weak potential network, stimulated by Schumann waves, it will produce frequency resonance, the strength of its resonance is related to the internal structure of the electrical network (human body). 3. [Maintain Meridian Balance] Receive Schumann wave electromagnetic field and the body's cellular frequency resonance, maintain the overall balance of meridians, thus reducing the damage caused by EMF free radiation to the human body. 4. [Simulation Of Magnetic Field] Ultra low frequency pulse generator is to simulate natural regenerative geomagnetic field by electronic method, such as using square wave generator to generate artificial 7.83Hz Schumann wave frequency instead of natural Schumann wave. 5. [Safe And Healthy] Schumann wave generator can induce human body frequency resonance, replenish natural geomagnetic and artificial attenuated electromagnetic field EMF interference, so that the cell membrane potential balance health. Specification: Item Type: Schumann Wave Generator Material: PCB Output: 7.83HZ Pulse Square Wave Power Supply: +5V at 0.1A. Package List: 1 x Schumann Wave Generator1 x USB Cable