Features 1、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 body 2、STABLE FREQUENCY: Schumann wave pulse generator adopts DSP signal synthesis technology, with stable signal and high frequency stability 3、MULTIPLE 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 4、DURABLE TO USE: Ultra low frequency pulse generator ensures accurate working with a good durability and wear resistance, you can use for a long time 5、TECHNICAL PARAMETERS: The audio resonator is powered by a USB interface with a voltage of 5V, rated current of 0.5A and frequency of 7.83Hz Specification Item Type: Schumann Wave Generator Power Supply Voltage: 5V(USB interface) Rated Current: 0.5A Signal Waveform: Pure sine wave Frequency: 7.83Hz Package List 1 x Schumann Wave Generator 1 x Data Cable