Features： 1、It is small size, full function, easy operating and portable. 2、With an oscilloscope, which can be used in electronic circuit experiment and debugging, the frequency characteristics of audio amplifier and pulse response of test and measurement. 3、Due to the excellent DSS accuracy and frequency stability, it can also be used to calibrate the sweep time factor for oscilloscopes. 4、The square wave output is suitable for oscilloscope attenuator and probe pulse characteristic adjustment. 5、It can be powered by an adapter or a lithium battery. Specification： Features: It is small size, full function, easy operating and portable. With an oscilloscope, which can be used in electronic circuit experiment and debugging, the frequency characteristics of audio amplifier and pulse response of test and measurement. Due to the excellent DSS accuracy and frequency stability, it can also be used to calibrate the sweep time factor for oscilloscopes. The square wave output is suitable for oscilloscope attenuator and probe pulse characteristic adjustment. It can be powered by an adapter or a lithium battery. Specifications: The main output waveform : sine wave and square-wave, Triangular wave, sawtooth wave.  Maximum output amplitude : +/- 10Vpp (no-load)  Output impedance : 50Ohm+/-10%  Dc bias : +/- 10V (no-load)  Display : LCD1602  Material:metal  Resolution : 1 Hz  Power supply : DC 3. 5-10V  Output frequency range :  Sine wave : 1Hz-500KHz  Square-wave : 1 Hz - 20kHz (the valid range)  Triangular wave : 1 Hz - 20KHz (the valid range)  Sawtooth wave : 1 Hz - 20kHz (the valid range)  Package Size:20x15x5cm Package Weight:210g Package List: 1 x Function Signal Generator  1 x USB Package List： 1 x Function Signal Generator  1 x USB