Schumann Wave Generator 7.8 Hz (Adjustable)

Emits ultra-low-frequency pulses that replicate the Earth's natural resonance, known as the Schumann frequency (7.83 Hz). Promotes relaxation and well-being Improves sleep Enhances audio and visual reception Neutralizes electromagnetic interference Supports meditation and focus Frequency adjustable from 0.01 Hz to 100,000 Hz Power supply: USB Type-C Brand-new item, never used. I can ship it or deliver it in person in the Castelo Branco area.