Check the listing for details. 1HZ-500KHZ FG-100 DDS Functional Signal Generator Sine Y4V5. Condition: New. Listed at 22.36 USD. Features: Output Waveform -- Sine, , , , forward sawtooth , reverse sawtooth , electrocardiogram (ECG ), noise . DDS Frequency -- Sine 1- 500KHz (the output amplitude will decrease with the further increase of frequency), other waveforms 1 Hz-50KHz (but the upper limit of adjustable frequency is not limited, if the distortion and shaking requirements are not high, use the frequency can be further increased). Application -- Due to the DSS accuracy and frequency stability, it can also be used to calibrate the factor for oscilloscopes. You can also use its to calibrate your oscilloscope attenuator or adjust your oscilloscope probe Versatile -- Its can be either adaptor or a Lithium . 4-10V, it is recommended to choose 5V when using the , and 3.7V lithium when using . Large LCD Screen -- Large LCD display with backlight for easy instant reading. Labeled function button for easy operation. Working with an oscilloscope, it can be used to troubleshoot the electronic circuit, characterize the audio amplifier frequency response or measure the impulse response. Have a filter (can be opened and closed) to suit the output of sine and pulse . Specification: : 4-10V Current: 250mA Frequency : sine 1-500kHz Resolution: 1 Hz Sine distortion: