TOTMC&reg; 1HZ-500KHz DDS Function Signal Generator Module Sine+Triangle+Square Wave Compact, complete functions, simple operation, easy to carry. You can use as an adapter, can also use as a lithium battery. 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. Square-wave output for oscilloscope and probe pulse characteristics attenuator adjustment.