7.83HZ Schumann Wave Generator Low Frequency Pulse Sinewave Generators Sound Improving Ultra Low Frequency Pulse Generator Precise Frequency Helps Sleep with USB. The Schumann Wave Generator comes equipped with a built-in lithium battery and includes a micro USB cable for convenient charging. With its four-light power indicator that blinks during charging and a low energy consumption of 5V, 0.08A, this device ensures long-lasting use on the go. Our Low Frequency Pulse Sinewave Generators produce sine waves through a programmable smart chip, operating at a fixed frequency of 7.83Hz. This offers higher frequency precision and stability, allowing for customizable waveform, frequency, and power settings to suit your needs. Featuring a USB output port, the Ultra Low Frequency Pulse Generator can also serve as a 5V power source. This makes it not only a generator of beneficial frequencies but also a convenient power supply for other devices. The Schumann Resonance Pulse Generator simplifies operation with a click switch to power on/off and display battery level. A long press of the switch for 5 seconds turns off the output, making it user-friendly and efficient. Designed for versatility, the Pulse Generator enhances audio-visual spaces by improving sound fields and visual effects, offers relief from insomnia in bedrooms, and reduces stress and anxiety in offices, helping to relax and improve work efficiency.