... widthx10Accuracy3%Trigger systemModeAuto, NORM, TV-V, TV-HTrigger sourceVERT, CH1, LINE, EXTSensitivityandfrequencyAUTO NORM 20Hz-40MHz(VERT)INT1.5divEXT0.8Vp-pRangeTV-HOver ... notice. MCH Analog Oscilloscope,V-5040 40MHz oscilloscope, Dual Oscilloscope, low cost price oscilloscope