1. High-signal generator: This DIY kit and shell can produce sine waves, triangular waves, and square waves with high accuracy. 2. Adjustable frequency and amplitude: The frequency can be adjusted in the range of 1 Hz to 1 MHz, and the amplitude can also be adjusted. 3. Five accuracy resolution: With five accuracy resolutions and coarse and fine tone frequency adjustment options, allowing for precise control over the signal output. 4. Wide power supply range: Compatible with both external power supply of 9-12 V DC and 9 V battery, providing a flexible power option. 2-3 practical use scenarios - Electronics lab bench testing: Generate test signals to characterize circuits, debug issues, and verify behavior of analog and mixed-signal designs. - Microcontroller and ADC/DAC testing: Provide controlled inputs for validating sampling, conversion accuracy, and signal integrity in microcontroller projects. - Audio, filter, and amplifier experiments: Use sine, triangle, and square waves to analyze responses, tune filters, and test audio-related circuits.