Adopting ICL8038 and high-speed operational amplifier, with higher accuracy;It can output sine/triangular/square wave/forward and reverse sawtooth waveforms; Frequency range: 5Hz~400kHz; Duty cycle range: 2~95% (adjustable); Support dual power amplifiers without blocking capacitors, ensuring high and low frequency signal distortion; Adjustable frequency and amplitude;Frequency adjustment has coarse and fine tuning functions;All are through-hole components, easy to install. Different batches may have different appearance, which does not affect use.Depending on the batch, the colors of electronic components/knobs, etc. may be different, which does not affect use. Parameter: Power supply voltage: 12V~15V Frequency range: 5Hz~400KHz (adjustable) Duty cycle range: 2~95% (adjustable) Low distortion sine wave: 1% Low temperature drift: 50ppm/° C Output triangular wave linearity: 0.1% DC bias range: -7.5V~7.5V Output amplitude range: 0.1V~11VPP (working voltage 12V) Interface Description: 1. SQU: Output rectangular wave 2. SIN/TA: Output sine wave or triangular wave 3. GND: Grounding 4. Potentiometer function: 1) Duty cycle: Adjusting the duty cycle range 2) Frequency regulation: Adjusting the frequency 3) Signal adjustment: Signal DC bias adjustment 4) Amplitude adjustment: sine wave, triangular wave, sawtooth wave amplitude modulation Pre purchase instructions: This kit (loose parts) is not a finished product and is only used for scientific research and experiments. This kit is not suitable for customers who require finished products. Assembling and debugging the kit (loose parts) requires corresponding knowledge and skills. Colour:Black Material:FR4+ electronic components Package Contents: 4 x signal generator DIY kit without shell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3c