Compact size, full-featured, simple operation, easy to carry. Together with the oscilloscope, it can be used for electronic circuit testing and debugging, testing and measurement of frequency characteristics and impulse response of audio amplifiers. Due to the good accuracy and frequency stability of DDS, it is also very suitable for oscilloscope sweep time factor calibration. The square wave output is suitable for oscilloscope attenuator and probe pulse characteristic adjustment, etc. Main technical specifications: 1. Frequency range: sine wave 1Hz-500kHz (where the output amplitude is flat up to 200 kHz, and the output amplitude be reduced as the frequency is further increased), other waveforms 1Hz-20kHz (but the upper limit of the adjustable frequency is not a limitation, and the use of the frequency can be further increased if the distortion and wobble are not required). 2. Resolution: 1Hz. 3. Output waveforms: sine wave, square wave, triangle wave, forward sawtooth wave, reverse sawtooth wave, noise wave, ECG. Parameters can be saved after setting. 4. Sine wave distortion: Less than 1% below 1kHz, Less than 0.5% above 1kHz. 5. Output amplitude: maximum 10V (P-P). 6. Output impedance: 50 ohms. 7. DC offset: max 10V, with shutdown function. 8. There can be open and close the filter, can be well adapted to sinusoidal and pulse waveform output. 9. Power supply: DC3.5-10V, recommend the use of adapter DC5V. Colour:White Material:Plastic Package Contents: 1 * Function Signal Generato 1 * USB cable 1 * BNC cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.