4 test frequencies, can be used when connected to an oscilloscope, both analog oscilloscopes and digital; oscilloscopes can be used; Dual signal input, alternating display; 4-gear frequency, alternating speed adjustable; One click on single channel / alternating display HOW TO USE: Oscilloscope parameter setting: Adjust the oscilloscope to X-Y mode(different oscilloscopes have different adjustment methods, please explore by yourself). Adjust the vertical parameters of the 2 channels of X Y to 1V/div, and only one of the single-track oscilloscopes needs to be adjusted. The analog oscilloscope does not need to adjust the time base, the digital oscilloscope time base is adjusted between 1-5ms After the connection is correct, the oscilloscope display a horizontal line. If a vertical line is displayed, the xY plug be reversed. Adjust the vertical and horizontal parameters, the horizontal and vertical lines are in the display box., Weight: 0.85429126525 Pounds, Manufacturer: Ehwisbe