Schumann wave itself is not directly acting on the sound or video products to improve the quality of sound quality, but the role of the space environment, people's physical and mental relaxation, improve the body's perception of sound and images, improve the health of the human body to improve the efficiency of work, mental stress also have a better effect. This product can not only output 7.83Hz Schumann wave, but also can adjust the frequency within the range of 0.1Hz~30KHz, digital circuit crystal oscillator frequency reference, more stable, stronger anti-interference Circuit board size: 15*15cm Waveform: Sine wave(can't output Other waves) Power supply interface: DC5.5*2.1 Supply voltage: 5V Rated power consumption: <1W Default frequency: 7.83Hz Adjustment range: 0.1Hz~30000Hz Signal voltage amplitude: 3V How to change the frequency: directly enter the frequency and then press OK to complete the setting For more information please Google "Schumann Resonance". For audio-visual space - to enhance the sound field and audio-visual effects For the bedroom - to help sleep soothe the nerves, treatment of insomnia For the office - relax and improve work efficiency For the create space - to improve creative inspiration For the tea ceremony, spirituality, realization space - resting body and mind Package include : 1xSchumann Resonance Ultra-low Frequency Pulse wave Generator Audio Resonator 1x USB cable