Professional oscilloscope measurement for accurate waveform analysis.Programmable frequency modulation technology for adjustable frequency range.High-quality materials for good frequency stability and strong anti-interference ability.USB-powered for convenient and versatile usage.Output 7.83Hz Schumann wave for holistic well-being. Introducing the audio resonator, a professional oscilloscope measurement device that brings the power of 7.83Hz standard sine wave technology to your fingertips. This innovative product not only outputs the Schumann wave at 7.83Hz, but also features programmable frequency modulation, allowing you to adjust the frequency within a wide range of 0.001Hz to 200KHz. Crafted from high-quality materials, it offers excellent frequency stability and is equipped with a digital circuit crystal oscillator frequency reference for enhanced stability and anti-interference capabilities. With its versatile USB connectivity, you can easily power it using a power box, USB charging head, or any other USB-powered device. Experience the benefits of this cutting-edge technology and take your audio resonance to new heights with the audio resonator. Item Name: Audio Resonator Material: PCB Board Features: Versatile, Convenient, DurableCircuit Board Size: 150*150 Mm/5.9*5.9 InchesAntenna Waveform: Sine WaveInterface Waveform: Sine Wave, Square Wave, Inverted Square Wave (the Lower Left Corner Is The Output Interface, And The Waveform Is Output at The Same Time)Power Interface: DC5.5*2.1Voltage: 5VRated Power Consumption: