Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ DIY Supplies: ELECTRICAL _x005f_x000D_ _x005f_x000D_ Hign-concerned Chemical: None _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Product description: _x005f_x000D_ The Schumann wave itself does not directly act on audio or video products to improve the sound quality, but it acts on the space environment, relaxes the body and mind, improves the body's perception of sound and images, improves the body's healthy work efficiency, relieves psychological pressure, and has better effects. This product can not only output 7.83Hz Schumann waves, but also adjust the frequency within the range of 0.1Hz~30KHz. It uses a digital circuit crystal oscillator frequency reference, which is more stable and has stronger anti-interference. _x005f_x000D_ Product parameters: _x005f_x000D_ Black standard version: _x005f_x000D_ Antenna waveform: sine wave _x005f_x000D_ Interface waveform: sine wave + square wave + inverted square wave (the lower left corner is the output interface, and the waveforms are output simultaneously) _x005f_x000D_ Power interface: DC5.5*2.1 _x005f_x000D_ Power supply voltage: 5V _x005f_x000D_ Rated power consumption: