SEESII DDS Functional Signal Generator: 1Hz-500kHz Portable Audio Signal Generator, Sine/Triangle/Square/Sawtooth Waveforms, USB-Powered, for Oscilloscope Testing & Circuit Debugging

["This DDS signal generator features a frequency range of 1Hz to 500kHz; Compact yet high-performance, it is intuitive to operate and effortless to carry; Powered directly by USB, it requires no batteries or additional AC/DC adapter","Paired with an oscilloscope, it is ideal for electronic circuit testing and debugging, audio amplifier frequency and impulse response analysis, as well as oscilloscope sweep time factor calibration","The built-in square wave performs perfectly for oscilloscope attenuator adjustment and probe impulse response tuning; A switchable filter is also integrated to deliver optimized sine wave and pulse wave output","It supports output of sine, square, triangle, positive and negative sawtooth waveforms, serving as an essential professional tool for electronic engineering work"]