| Brand | Unbranded |
|---|---|
| Marke | Markenlos |
Check the listing for details. FM783 Schumann Wave Generator 7.83HZ Ultra-low Frequency Pulse with USB Cable. Condition: New. Listed at 4.98 USD. And everyone has a weak potential network, excited by Schumann waves, it will produce frequency resonance, and the strength of its resonance is related to the internal structure of the electrical network (human body).
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