Product features:
1. Adopting high-quality materials, the product has good frequency stability;
2. This product can not only output 7.83Hz Schumann resonances wave, but also add programmable frequency modulation technology, which can adjust the frequency in the range of 0.1Hz~30KHz;
3. There are two specifications to choose from according to demand. The red square wave cannot be adjusted with a fixed frequency of 7.83Hz, while the green standard model has adjustable frequencies ranging from 0.1Hz to 30000Hz;
4. Digital circuit crystal oscillator frequency reference, more stable and more anti-interference;
5. The power interface adopts a DC5.5 * 2.1 interface, which is convenient to use. The USB end can be plugged into the power bank, USB charging head, or other USB powered devices to work.

Product Description:
Schumann resonances itself does not directly act on sound or video products to improve the sound quality, but on the space environment, which can relax the body and mind, improve the body's perception of sound and images, improve the health work efficiency of the human body, and relieve Psychological stress. This product can not only output 7.83Hz Schumann resonances wave, but also adjust the frequency in the range of 0.1Hz~30KHz. The digital circuit crystal oscillator frequency reference is more stable and more anti-interference.

Product parameters:

Green standard version:
Circuit board size: 15 * 15cm
Antenna waveform: sine wave
Interface waveform: sine wave+square wave+inverse square wave (the bottom left corner is the output interface, and the waveform is output simultaneously)
Power supply interface: DC5.5 * 2.1
Power supply voltage: 5V
Rated power consumption:<1W
Default frequency: 7.83Hz
Adjustment range: 0.1Hz~30000Hz
Sinusoidal signal voltage amplitude: 3V
Square wave signal voltage amplitude: 5V

Change frequency method:
Directly input the frequency and press the bottom left button to complete the setting
For example, by pressing [7] [.] [8] [3] and then [OK], you can set the default power on output to 7.83Hz, with a range of 0.1~30KHz

Red non adjustable version:
Circuit board size: 10 * 10cm
Waveform: square wave
Power supply interface: DC5.5 * 2.1
Power supply voltage: 5V
Rated power consumption:<1W
Default frequency: 7.83Hz
Adjustment range: non adjustable
The frequency of this model is not adjustable, and the output is a square wave. The frequency is fixed at 7.83Hz Schumann frequency. Press the mode adjustment button to switch between strong flashing high power, weak flashing low power, and constant lighting

Usage:
Take out the USB cable that comes with the product, connect the round hole end to the circuit board, and plug the USB end into the power bank, USB charging head, or other USB powered devices to work properly
Green adjustable version change frequency: directly input the frequency and press "OK" to complete the setting
Note: This product does not have a transparent plastic shell

Product List:
1 * Schumann resonances wave generator
1 * USB cable