0,01-100kHz Schumann Resonanzen reiner Sinus Signalgenerator für entspannten Schlaf
ab 8,99 €
But also can adjust the frequency within the range of 0.01Hz~100KHz. This product can not only output 7.83Hz Schumann wave. digital circuit crystal oscillator frequency reference, more stable, stronger anti-interference.
Jetzt bei Ebay: