Output a Variety of Waveforms: sine wave, square wave, triangle wave, forward sawtooth wave, reverse sawtooth wave, ECG wave, exponential rise, exponential fall, Lorentz pulse, Gaussian pulse, Sink pulse, half wave, full wave, Schumann wave, noise wave and other 15 waveforms Schumann Wave Function: This signal generator is equipped with a Schumann resonator, which can generate 7.83 Hz propagation waves Portable and Compact Function Generator: Mini portable design, but can do everything that a large desktop signal generator does, and even more, easy to carry Frequency Range: sine wave 0.01Hz-500kHz, other waveforms 0.01Hz-100kHz. Resolution: 0.01Hz High Precision and Frequency Stability: very suitable for oscilloscope time factor calibration, used with oscilloscope, can be used for electronic circuit testing and adjustment, frequency characteristics and pulse response test and pre-measurement of audio amplifiers, as well as testing the power output of old amplifiers, or as a signal source for tracking circuit failures