Features: Wide frequency adjustment: 0.1Hz ~ 100000Hz adjustable, flexible coverage of a variety of application scenarios, to meet different needs. Button operation: simple and convenient design, novice can also easily get started, operation without pressure. Schumann waves simulation: simulate the natural Schumann waves 7.83Hz , which is helpful to relax and promote health. Highly integrated design: digital circuit replaces analog circuit to improve anti-interference ability and system stability. Material: high transparent acrylic shell, beautiful and durable, moderate size, easy to place and carry. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description Product parameters: Antenna waveform: sine waves Power supply interface: Micro USB interface Power supply voltage: 5V Rated Power consumption: 0.5W Default Frequency: 7.83Hz Adjustment range: 0.1Hz to 100000Hz Product list: Schumann waves generator module * 1 (optional with Shell and without shell) * 1 Package List: 1x 0.01hz-100000hz Frequency Modulation Premium Chip Schumann-Wave Generator