Buy on Amazon.com : http://amzn.to/15iwNXt<br /><br />TOTMC? 1HZ-500KHz DDS Function Signal Generator Module Sine Triangle Square Wave<br /><br />Compact complete functions simple operation easy to carry You can use the adapter can also be a lithium battery <br />Together with the oscilloscope can be used to test and measure electronic circuit testing and debugging audio amplifier frequency characteristics and impulse response As good accuracy and frequency stability of DDS is also very suitable for scanning time oscilloscope calibration factor <br />Square-wave output for oscilloscope and probe pulse characteristics attenuator adjustment
