Feature:1. [USB Interface] Pulse generator adopts micro USB port power supply, the standard is and5V 0.1A, the factory comes with USB cable, easy to use.2. [Ultra Low Static Power Consumption] Using imported ultra low static power main control IC, this pilse generator provides you with more stable waveform.3. [Output 7.83HZ] Output 7.83HZ pulse square wave duty cycle of 50 percent , the frequency can be fine tuned correction, outstanding performance.4. [Excellent Performance] Schumann waveform 7.83HZ low frequency generator has high accuracy , good stability and long service life, so it is your worry free choice.5. [Use] Pulse generator can be used to enhance the sound field and sound visual effects, help sleep soothe the nerves, relaxation and improve work efficiency, etc.Specification:Item Type: Schumann Wave GeneratorMaterial: PCBOutput: 7.83Hz Pulse Square WaveInterface: USB.Package List:1 x Schumann Wave Generator1 x USB Cable