Precision and endurance: The sine wave resonance generator uses a low temperature drive crystal oscillator and a special chip for high-precision DACs to produce precise pure sine frequencies and waves. High-quality materials ensure endurance

Stable The sine wave resonance generator ensures stable frequency output with a standard value of 7.83Hz. In addition to 7.83 Hz, the following frequencies are also beneficial for your body: 0.83, 6.5, 14.3, 20.8, 27.3 and 33.8 Hz (33.81 Hz)

COMPACT & PORTABLE The Schumann Wave adjustable signal generator is compact and easy to carry, allowing you to use it at home or when traveling

How to use: remove the included USB cable, insert the end of the round hole into the circuit board and the USB end into a power bank or USB charging head or other USB powered device

Easy to Use Press the button to enter other frequencies yourself, and then press the OK button. Voltage range of the sine wave signal of 3 V