Product information: Specifications and parameters (standard): Circuit board size: 15 * 15cm Antenna waveform: sine wave Interface waveform: sine wave square wave inverted square wave (the lower left corner is the output interface, and the waveform is output at the same time) Power supply interface: DC5.5 * 2.1 Power supply voltage: 5V Rated Power consumption:<1W Default Frequency: 7.83Hz Adjustment range: 0.1Hz to 30000Hz Sinusoidal signal voltage amplitude: 3v Square wave signal voltage amplitude: 5V Specifications and parameters (special offer): Circuit board size: 10 * 10cm Waveform: square wave Power supply interface: DC5.5 * 2.1 Power supply voltage: 5V Rated Power consumption:<1W Default Frequency: 7.83Hz Adjustment range: not adjustable Green Set: Adjustable Shumanbo+Headphones+Storage Bag Packing list: 1* signal gen erator Product Image: