Item Type: Schumann Wave Generator_x000D_ Material: PCB_x000D_ Purpose: Pulse generator_x000D_ Colour: Black_x000D_ Power Supply Voltage: 5V (USB interface)_x000D_ Rated Current: 0.5A_x000D_ Frequency: 7.83Hz_x000D_ Signal Strength: The button on the right is used to adjust the strength (section 0, 1, 2, 3, 4)_x000D_ Application:_x000D_ 1. Used for creation space to improve creation inspiration_x000D_ 2. Used in the bedroom to help sleep soothe the nerves and relieve insomnia_x000D_ 3. Used in the office to relax and improve work efficiency_x000D_ 4. Used in the audio visual space to enhance the sound field and audio visual effects_x000D_ 5. Used in tea ceremony, spiritual practice, and meditation space to calm the body and mind