Feature: 1. [Versatile Testing] The DDS functional signal generator can test various waveforms, including sine, square, triangular, positive sawtooth, reverse sawtooth waveform, etc., specially designed for professionals. 2. [Wide Range of Applications] When used in conjunction with an oscilloscope, this signal generator is suitable for electronic circuit testing and debugging, frequency response and pulse response testing of audio amplifiers. 3. [High Accuracy] The signal source module has high accuracy and frequency stability, also suitable for oscilloscope time factor calibration. 4. [Built in Filter] There is a filter that can be turned on and off, which can adapt well to sine and pulse waveform outputs, ensuring reliable performance. 5. [Compact and Portable] Compact in size, full functional, easy to operate, convenient to carry, this function generator can be powered by power adapter or 3.7V lithium battery(battery not included). Specification: Item Type: DDS Functional Signal Generator Material: ABS Size: Approx. 140x80x26mm / 5.51x3.15x1.02in Main Technical Parameters: 1. Output Waveforms: Sine waveform, square waveform, triangular waveform, forward sawtooth waveform, reverse sawtooth waveform, electrocardiogram waveform, exponential rise, exponential fall, Sinc pulse, half waveform, full waveform, noise waveform, etc. 15 types waveforms 2. Power Supply: DC4-9V, recommended to use DC5V when using the adapter, and 3.7V lithium battery when using battery power(Battery not included) 3. Current: 180MA at 5V 4. Frequency Range: Sine waveform 0.01Hz-500.00kHz (output amplitude decreases with further frequency increase), other waveforms 0.01Hz-100.00kHz (but without limiting the upper limit of adjustable frequency, if distortion and jitter requirements are not high, frequency usage can be further increased) 5. Resolution: 0.01Hz 6. Sine Waveform Distortion: