DDS Signal Generator Triangle Wave Sine Square Sawtooth Wave DIY Kit 1Hz-65534Hz DC 7V-9V        Features:  Operating voltage: DC7-9V  DDS frequency range: 1HZ-65534Hz.  Display: 1602 LCD  High-speed frequency (HS) output up to 8MHz;  DDS signal amplitude of the offset amount can be adjusted separately by two potentiometers;  DDS signals: sine wave, square wave, sawtooth, reverse sawtooth, triangle wave, the ECG wave and noise wave.  Section into the value: 1,10,100,1000,10000 Hz;  The power automatically restore the last used configuration.  Offset: 0.5pp-5Vpp  Amplitude amount: 0.5Vpp-14Vpp      Key Functions:  The UP output waveform select  The DOWN output waveform select  LEFT output frequency -  RIGHT output frequency +  STOP / RUN the output stop / start    "UP" key waveforms order:  ECG = electrocardiogram wave (in the OFF state, the "left "and "right" keys to set the output frequency. Middle button start, all of the following waveform set)  Rev Sawtooth = reverse sawtooth  SawTooth = sawtooth  Triangle = triangle wave  Square = square wave