Features: Schumann Resonator: This product is a Schumann Resonator that can simulate specific frequencies in the natural environment of the Earth, bringing relaxation and balance to the body and mind. Two-in-one technology: sound wavy pulse and electromagnetic waves 2-in-1 technology, exquisite clear shells, thin body, USB insert and play, with adjustable strength switches. High power: The product has the ability to output high power, ensuring stable and powerful signal transmission, increasing the coverage and effectiveness of the product. ELF7.83Hz frequency: The product uses an extremely low frequency of 7.83Hz as main output frequency, which is the natural resonance frequency bands of the Earth and is harmless to the human body. S-DYG emission technology: The product adopts S-DYG emission technology, which can effectively generate and transmit Schumann waves signals, providing strong signal quality and propagateions effects. Specifications: Material: ABS Color: Gray Housing Size: Approx. 10x10x1cm/3.94x3.94x0.39inch Power Supply Voltage: 5V Power Interface: Micro USB Port Average Power Consumption: Less Than 5W Power Consumption of Pulse: Less Than 300W Frequency: 7.83Hz Package Includes: 1x Schumann Resonance Generator note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.