The signal generator DIY kit is a professional product that can generate sine wave/Triple-Cornered wave/square wave/positive and negative wave. This is a DIY kit to solder and install. Using ICL8038 and high-speed operational amplifier, the accuracy is higher. Can output sine/Triple-Cornered/square wave/forward and reverse waveforms. Frequency range: 5Hz~400kHz; duty range: 2~95% (adjustable) Supports bi-amping, will not block capacitors, and high and low frequency signal distortion. Adjustable frequency and amplitude. The frequency adjustment has coarse and fine adjustment functions. All are through-hole components, easy to install. Power supply : 12V~15V Low distortion true sine wave: 1% Low temperature drift: 50ppm /°C Output Triple-Cornered wave linearity: 0.1% DC range: -7.5V~7.5V Output amplitude range: 0.1V~11VPP (working 12V) Board size: . 7.8 x 5cm / 3.07 x 1.97 inch Finished product size: . 8.7 x 6 x 1.7cm / 3.43 x 2.36 x 0.67 inch Material:FR4 + Acrylic colour:black Package Contents: 1 * Low frequency signal generator DIY kit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.