Feature:1. STABLE FREQUENCY: Schumann wave pulse generator adopt DSP signal synthesis technology, with stable signal and high frequency stability, you can use with confidence2. MULTIPLE USES: Schumann resonance generator can be connected to an external oscilloscope to observe waveforms. Can also be connected to the external speaker, hand touch feeling waveform vibration3. BENEFIT TO HEALTH: The schumann wave generator benefit people physical and mental relaxation, improve body perception of sound and images, and improve health of human body4. TECHNICAL PARAMETERS: The schumann wave generator is powered by a USB interface with a voltage of 5V, rated power of less than 1W and frequency of 7.83Hz5. RELIABLE TO USE: Ultra low frequency pulse generator ensure accurate working with a good durability and wear resistance, you can use for a long timeSpecification:Item Type: Schumann Resonance GeneratorAntenna Waveform: Sine waveInterface Waveform: Sine wave, square wave, inverted square wave(output interface in the lower left corner, waveforms output simultaneously)Power Supply Voltage: 5VRated Power: <1WDefault Frequency: 7.83HzAdjustable Frequency Range: 0.1Hz-30000HzSine Signal Voltage Amplitude: 3VSquare Signal Voltage Amplitude: 5V.Package List:1 x Schumann Resonance Generator1 x Power Cord