1. Low Consumption; Wide Application; Small Size; Stable Performance; Exquisite Workmanship. 2. Schumann Wave Generator, We Call It for Tesla Wave Generator, But We Usually Call It Metaphysical Wave Generator. 3. It Is Essentially An Extremely Low Frequency (ELF) Electromagnetic Wave. According To The Wavelength Multiplied By The Frequency Of The Speed Of Light, The Wavelength Of The 7.83hz Electromagnetic Wave Is 38,000 Kilometers, Which Is Very Close To The Well-Known Circumference Of The Earth Of 40,000 Kilometers. 4. In Fact, for Tesla Waves Are An Inherent Attribute Of Geophysical Characteristics. They Form An Electromagnetic Resonance Cavity On The Surface And Ionosphere, And 7.83HZ Is The Natural Frequency Of This Resonance Cavity. 5. When Electromagnetic Waves Of Such A Frequency Are Emitted, A Standing Wave Will Be Formed In The Earth's Space, Which Will Oscillate Continuously For A Long Time. Working Mode:Power 7.83HZ Extremely Low Frequency Electromagnetic Wave:0.3MW Without Any Sound Battery Life:About 1 Year Charging Method:Built-In 2000mA Lithium Battery, Charging Using The Type-C Interface Common To Mobile Phones (Mobile Phone Charger Is Enough, No Current Limit) The Red Light Is Always On:Charging Green Light Stays On:Fully Charged Blue Light Flashes:Transmitting Status Lights Out:Power Off/Battery Exhausted Power Supply Voltage:5V 1A Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:ABS Size:About 16.5x13x3.5cm Package Contents: 1 * Resonance Frequency Generator 1 * Connecting 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.