High-precision signal generator in a compact DIY kit with shell. It can produce sine waves, triangular waves, and square waves with accurate output. Adjustable frequency and amplitude - Frequency range: 1 Hz to 1 MHz - Amplitude is adjustable to the desired level Five accuracy resolution - Coarse and fine frequency adjustment options for precise control over the output signal Wide power supply range - Compatible with external 9-12 V DC power supply or a 9 V battery Compact, ready-to-use design - Built as a DIY kit with a sturdy shell for easy integration into projects and bench setups Practical applications - Electronics testing and circuit calibration, signal integrity checks, and filter response analysis - Microcontroller and embedded system development, PWM and waveform testing - Audio electronics and educational experimentation to explore waveform effects This device focuses on function, compatibility, and reliable performance, offering a straightforward tool for precise waveform generation in a compact package.