This functional signal generator can test many kinds of wave forms, such as: sine wave, square wave, sawtooth, reverse sawtooth, triangle wave, the ECG wave and noise wave.   Features:   Small size, powered by DC 9V, easy and portable for use.   DDS frequency range: 1Hz-65534Hz, 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.   LCD display for clear reading, intuitive touch buttons.   The power automatically restore the last used configuration.   KEY FUNCTIONS:   UP output waveform select   DOWN output waveform select   LEFT output frequency -   RIGHT output frequency +   STOP / START 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   Specifications:   Display: 1602 LCD   Operating Voltage: DC 9V   DDS Frequency Range: 1Hz-65534Hz   Frequency(HS) Output: up to 8MHz   Section into the Value: 1, 10 , 100, 1000, 10000 Hz   Offset: 0.5pp-5Vpp   Amplitude Amount: 0.5Vpp-14Vpp   Power Cable Length: Approx. 70cm / 27.56in   Size: 135 * 80 * 32mm / 5.3 * 3.15 * 1.26in   Weight: 176g / 6.21oz   Package Weight: 194g / 6.86oz   Package Included:   1 x DDS Function Signal Generator      1 x Power Cable