Check the listing for details. Multifunction Transistor Tester Diodes Plastic Full Color Graphics Display New. Condition: New. Listed at 35.29 USD. Product DescriptionFeatures: It is small but has many functions, easy to operate and carry. It can be used with oscilloscope to test and debug electronic circuit, the frequency response of audio amplifier and impulse response. The square waveform is suitable for oscilloscope attenuator and the adjustment of probe impulse response. It also can calibrate the sweep time factor of oscilloscope. Have a filter (can be opened and closed) to suit the output of sine wave and pulse wave. Specifications: The Output Signal Types: sine, square, triangle, positive and negative sawtooth waveform.Frequency Range: sine wave is 1Hz-500kHz, other kinds of waveforms is 1Hz-20kHz.Resolution: 1HzSine Wave Distortion: under 1kHz < 1%, over 1kHz