Feature: * It can produce sine waves, triangular waves, Square waves. * The frequency can be adjusted from 1Hz-1MHz, the amplitude of the frequency can be adjusted. *Five accuracy resolution, frequency adjustment has coarse tone, fine tone. *The power supply range is wide, and the external power supply 9-12V or 9V battery can be used. *All directly insert components, the number of components is small, and the installation and debugging are simple. Specification: Voltage support: 9-12VDC input WaveForms: Square, Sine & Triangle Impedance: 600 OHM + 10% Frequency: 1Hz -1MHz Sine wave Amplitude: 0-3V at 9V DC Input Distortion: Less than 1% (AT 1KHz) Flatness: +0.05DB 1Hz -100kHz Square wave Amplitude: 8V (No load) at 9V DC Input Rise time: Less than 50ns (at 1kHz) Fall Time: Less than 30ns (at 1kHz) Symmetry: Less than 5% (AT 1kHz) Triangle wave Amplitude: 0 -3V at 9VDC Input Linearity: Less than 1% (up to 100kHz) 10mA Package included: 1*XR2206 High -precision signal generator (DIY Kit with shell)