Small size, multiple functions, simple operation, and easy to carry. Used with an oscilloscope, it can be used for electronic circuit experiments and debugging, as well as testing and measuring the frequency characteristics and impulse response of audio amplifiers. It is also a very suitable calibration factor for oscilloscope sweep times due to DDS and frequency stability. Square wave output is also suitable for main output waveforms such as oscilloscope attenuator and probe pulse adjustment: sine wave, square wave, triangle wave, sawtooth wave. Maximum output amplitude: +/- 10Vpp (no load) Output impedance: 50Ohm+/- 10%Dc Bias voltage: +/- 10V (no load) Display: LCD1602 Resolution: 1 Hz Power supply: DC 3. 5-10V output Frequency range: Sine wave: 1Hz-500KHz Square wave: 1 Hz - 20kHz (effective range) Triangular wave: 1 Hz - 20KHz (effective range) Sawtooth wave: 1 Hz - 20kHz (effective range) Color: White Material: Metal Packaging contents: 1 x Functional Signal Generator 1 x USB Adapter Cable Only the above package contents, other products are not included. NOTE: Lighting and different monitors may cause the color of the item in the picture to differ slightly from the actual item. Measurement error is +/-1-3 cm.