1. The Schumann wave is an extremely low frequency electromagnetic wave that can penetrate various materials and is non-ionizing radiation. 2. The Schumann wave is a naturally occurring frequency and is considered a continuous natural phenomenon. Exposure to this frequency may support general well-being. 3. Through resonance with the human body's biological rhythms, the Schumann wave may help maintain balance within the body's systems and may reduce the effects of environmental electromagnetic fields. 4. This device simulates a natural magnetic field using electronic methods, generating a 7.83 Hz frequency waveform similar to the natural Schumann resonance using a square wave generator. 5. The generator is designed to support frequency resonance with the human body, help maintain natural geomagnetic balance, reduce electromagnetic field (EMF) interference, and support cellular health. Specification: Item Type: Schumann Wave Generator Power Supply: Built-in Lithium Battery – USB Charging, with 4-level battery indicator Power Consumption: 5V 0.08A Working Frequency: 7.83Hz, generated by a programmable intelligent chip as a sine wave. Waveform and frequency are preset by default, with high frequency accuracy and stability. Additional USB-A port for external 5V power supply Size: 80 x 76 x 24mm / 3.15 x 2.99 x 0.94in Color: White Material: PU + Plastic Package Contents: 1 x Schumann Wave Generator 1 x USB Cable Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.