This product is a precision signal generator designed for stable frequency output and flexible modulation. It combines materials with advanced timing and conversion technology to deliver reliable performance in research, testing, and education. Key benefits stability: uses a low temperature drift crystal oscillator and a precision DAC to maintain accurate, repeatable frequencies. Flexible frequency output: can generate the 7.83 Hz Schuman wave and supports frequency modulation from 0.01 Hz to 100000 Hz. Strong interference rejection: digital circuit crystal frequency benchmark enhances stability and resilience against external interference. Versatile form factors: two specifications are available, without shell and with shell, selectable to meet different installation needs. Core features Frequency stability: achieved through low temperature drift crystal oscillator and precision DAC chip. Schuman wave output: capable of producing the 7.83 Hz Schuman wave for research and demonstration purposes. Programmable modulation: frequency modulation range from 0.01 Hz to 100000 Hz for versatile experimentation. Build and reliability: digital circuit crystal frequency benchmarking contributes to consistent performance in varying environments. Specifications and options Two form factors: without shell and with shell, available to suit specific usage requirements. Use scenarios Research and experiments: generate the Schuman wave for studies in resonance effects and to explore frequency response under controlled conditions. Equipment calibration and testing: provide precise, adjustable frequency signals to calibrate sensors, instruments, and signal chains. Educational demonstrations: illustrate frequency generation, modulation, and interference resilience in classroom or lab settings.