Frequency range: 5 Hz to 400 kHz; duty cycle range: 2% to 95% adjustable. accuracy waveform output powered by ICL8038 and a speed operational amplifier. Can output sine, TripleCornered, square, forward sawtooth, and reverse sawtooth waveforms. Supports biamping; no block capacitors; allows adjustable and low frequency signal distortion. Frequency and amplitude are adjustable. Signal generator DIY kit for professional use. Can generate sine wave, TripleCornered wave, square wave, and positive and negative sawtooth waves. Requires soldering and installation as part of the kit. Practical use scenarios Electronics lab testing: serve as a flexible signal source for evaluating amplifiers, filters, and ADC/DAC performance across a broad frequency range. Audio equipment calibration: generate precise test signals for calibrating signal paths, equalizers, and audio processing hardware, including both waveform shapes and duty cycle control. Education and hobby projects: learn waveform generation concepts, build and a versatile test signal source, and explore effects of waveform shape on circuit behavior.