Features HOW IT WORKS: The Schuman generator itself does not make any sound. Just plug in and use. No need to connect to another device. Does not directly act on audio or video products to improve sound quality and image quality, but act on the spatial environmen RELAXING EFFECT: Schumann wave 7.83Hz pure sine wave eliminate the frequency of electromagnetic wave and radio wave negative interference, making the sound space stable and harmonious, and the listener can enjoy the music more attentively and happily. Re STABLE SIGNAL SOURCE: Schuman wave generator adopt DSP signal synthesis technology, which has the characteristics of high signal stability and high frequency stability POWER SUPPLY: The Schumann wave pulse generator supplies 5V power through the Micro USB port. Mobile phone chargers and power supplies are available. Breathing light indicate operation, can assist sleep DUAL DIFFERENTIAL POWER OUTPUT: The audio resonator has a dual differential high fidelity drive circuit, which has stronger output capacity, strong output and no distortion of waveform Feature: 1. EXTERNAL PORT: The ultra low frequency pulse generator can be connected to an external oscilloscope to observe the waveform. You can also connect the external speaker, and you can feel the wave vibration with your hand Specification:Item Type: Schuman Wave GeneratorMaterial: Acrylic and PCB Power Supply Voltage: 5V(USB interface) Rated Current: 0.5A Signal Waveform: Pure sine wave Package List 1 x Schuman Wave Generator(random screw style and capacitor color) 1 x USB Cable