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Schumann Wave Generator 0.1Hz to 30000Hz Adjustable Sine Wave Resonance Generator 7.83Hz Ultra Low Frequency Generator Portable Signal Generator for Relaxation Sleep
$20.06$22.09(-9%)
- This product is a 7.83 Hz ultra-low frequency Schumann wave generator with high precision and stability.
- Equipped with a USB cable, it is easy to use. Its compact size makes it easy to
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