1. High-Frequency Stable Output: Supports Schumann frequency output with an adjustable range of 0.01Hz to 100,000Hz, ensuring signal stability. 2. Portable and User-Friendly: Designed for portability with simple operation, suitable for home, office, or travel scenarios. 3. Multiple Waveforms: Supports sine wave, square wave, and inverted square wave interfaces. 4. High Integration Design: Digital circuit technology replaces complex analog circuits, enhancing interference resistance and stability. 5. Schumann Wave Simulation: Simulates Earth's natural Schumann waves, promoting physical and mental relaxation and well-being. Specifications & Parameters Power Interface: DC5.5*2.1mm Rated Power Consumption: <1W Adjustment Range: 0.01Hz-100000Hz Interface Waveforms: Sine Wave + Square Wave + Inverted Square Wave Supply Voltage: 5V Default Frequency: 7.83Hz Antenna Waveform: Sine Wave Sine Wave Voltage Amplitude: 3V Square Wave Voltage Amplitude: 5V Color: As Shown Material: PCB Package Contents: 1* Schumann Wave Mainboard 1* Data Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.