40MHz Dual Oscilloscope: 1.DC-40MHz Freq. 2. Dual channel/dual tracing, X-Y mode 4.6" display, imported CRT,high sensitivity MCH Analog Oscilloscope,V ... a ratio of not less than 1:2.5Scan expansion widthx10Accuracy3%Trigger systemModeAuto, NORM, TV-V, TV-HTrigger sourceVERT, CH1, LINE, EXTSensitivityandfrequencyAUTO NORM ...