Feature 1BENEFIT TO HEALTH : The schumann wave generator benefit people physical and mental relaxation, improve body perception of sound and images, and improve health of human body 2STABLE FREQUENCY: Schumann wave pulse generator adopts DSP signal synthesis technology, with stable signal and high frequency stability 3MULTIPLE USES: Audio resonator can be connected to an external oscilloscope to observe waveforms. Can also be connected to the external speaker, hand touch feeling waveform vibration 4DURABLE TO USE: Ultra low frequency pulse generator ensures accurate working with a good durability and wear resistance, you can use for a long time 5TECHNICAL PARAMETERS: The audio resonator is powered by a USB interface with a voltage of 5V, rated current of 0.5A and frequency of 7.83HzItem Type: Schumann Wave GeneratorPower Supply Voltage: 5V(USB interface)Rated Current: 0.5ASignal Waveform: Pure sine waveFrequency: 7.83Hz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Schumann Wave Generator1 x Data Cable