Harness the Power of 7.83Hz Schumann Resonance with this Ultra-Low Frequency Pulse Wave Generator and Audio Resonator
View on Ali Express What are buyers saying? The 7.83Hz Schumann Resonance Ultra-Low Frequency Pulse Wave Generator with Box for Electrical has garnered mostly positive reviews from users who have found it to be effective and beneficial for various purposes. One reviewer mentioned using the device for meditation and...